CVS log for src/sys/ia64/ia64/machdep.c
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Revision 1.278.2.1.2.1: download - view: text, markup, annotated - select for diffs
Fri Nov 11 04:20:22 2011 UTC (2 months, 4 weeks ago) by kensmith
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SVN rev 227445 on 2011-11-11 04:20:22Z by kensmith Copy stable/9 to releng/9.0 as part of the FreeBSD 9.0-RELEASE release cycle. Approved by: re (implicit)
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Mon Nov 7 15:43:11 2011 UTC (3 months ago) by ed
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SVN rev 227309 on 2011-11-07 15:43:11Z by ed Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. The SYSCTL_NODE macro defines a list that stores all child-elements of that node. If there's no SYSCTL_DECL macro anywhere else, there's no reason why it shouldn't be static.
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Fri Sep 23 00:51:37 2011 UTC (4 months, 2 weeks ago) by kensmith
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SVN rev 225736 on 2011-09-23 00:51:37Z by kensmith Copy head to stable/9 as part of 9.0-RELEASE release cycle. Approved by: re (implicit)
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Fri Sep 16 13:58:51 2011 UTC (4 months, 3 weeks ago) by kmacy
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SVN rev 225617 on 2011-09-16 13:58:51Z by kmacy In order to maximize the re-usability of kernel code in user space this patch modifies makesyscalls.sh to prefix all of the non-compatibility calls (e.g. not linux_, freebsd32_) with sys_ and updates the kernel entry points and all places in the code that use them. It also fixes an additional name space collision between the kernel function psignal and the libc function of the same name by renaming the kernel psignal kern_psignal(). By introducing this change now we will ease future MFCs that change syscalls. Reviewed by: rwatson Approved by: re (bz)
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Sat Jun 25 02:15:14 2011 UTC (7 months, 2 weeks ago) by marcel
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SVN rev 223526 on 2011-06-25 02:15:14Z by marcel
Switch to the event timers infrastructure. This includes:
o Setting td_intr_frame to the XIVs trap frame because it's referenced
by the ET event handler.
o Signal EOI to the CPU before calling the registered XIV handlers.
This prevents lost ITC interrupts, which cause starvation in one-shot
mode.
o Adding support for IPI_HARDCLOCK with corresponding per-CPU counters.
o Have the APs call cpu_initclocks() so as to limited the scattering of
clock related initialization. cpu_initclocks() calls the <self>_bsp()
or <self>_ap() version accordingly.
o Uncomment the ET clock handling in cpu_idle().
o Update the DDB 'show pcpu' output for the new MD fields.
o Entirely rewritten ia64_ih_clock(). Note that we don't create as many
clock XIVs as we have CPUs, as is done on PowerPC. It doesn't scale.
We can only have 240 XIVs and we can have more CPUs than that. There's
a single intrcnt index for the cumulative clock ticks and we keep per
CPU counts in the PCPU stats structure.
o Register the ITC by hooking SI_SUB_CONFIGURE (2nd order).
Open issues:
o Clock interrupts can still be lost. Some tweaking is still necessary.
Thanks to: mav@ for his support, feedback and explanations.
ET stats while committing:
eris% sysctl machdep.cpu | grep nclks
machdep.cpu.0.nclks: 24007
machdep.cpu.1.nclks: 22895
machdep.cpu.2.nclks: 13523
machdep.cpu.3.nclks: 9342
machdep.cpu.4.nclks: 9103
machdep.cpu.5.nclks: 9298
machdep.cpu.6.nclks: 10039
machdep.cpu.7.nclks: 9479
eris% vmstat -i | grep clock
clock 108599 50
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Thu Jun 23 16:21:43 2011 UTC (7 months, 2 weeks ago) by marcel
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SVN rev 223478 on 2011-06-23 16:21:43Z by marcel Unblock the outgoing thread after we performed pmap_switch() to switch the region registers. pmap_switch() returns the pmap for which the region register are currently programmed, which needs to be re-programmed on the CPU the ougoing thread gets switched in. This change does not noticibly change anything or fix known bugs, but does give me a warm fuzzy feeling by being more correct.
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Sat Jun 11 02:22:11 2011 UTC (8 months ago) by marcel
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SVN rev 222971 on 2011-06-11 02:22:11Z by marcel Add the model number for the Montvale processor (marketed as Itanium 2 9100). At this time we're missing just one: Tukwila (Itanium 2 9300).
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Tue Jun 7 01:06:49 2011 UTC (8 months ago) by marcel
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SVN rev 222800 on 2011-06-07 01:06:49Z by marcel Call set_cputicker() to have the time counter use the ITC register. Note that the ITC frequency is fixed.
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Mon Jun 6 19:06:15 2011 UTC (8 months ago) by marcel
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SVN rev 222769 on 2011-06-06 19:06:15Z by marcel
Improve cpu_idle():
o cpu_idle_hook is expected to be called with interrupts
disabled and re-enables interrupts on return.
o sync with x86: don't idle when the CPU has runnable tasks
o have callers of ia64_call_pal_static() disable interrupts
and re-enable interrupts.
o add, but compile-out, support for idle mode. This will be
enabled at some later time, after proper testing.
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Tue May 31 15:11:43 2011 UTC (8 months, 1 week ago) by nwhitehorn
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SVN rev 222531 on 2011-05-31 15:11:43Z by nwhitehorn On multi-core, multi-threaded PPC systems, it is important that the threads be brought up in the order they are enumerated in the device tree (in particular, that thread 0 on each core be brought up first). The SLIST through which we loop to start the CPUs has all of its entries added with SLIST_INSERT_HEAD(), which means it is in reverse order of enumeration and so AP startup would always fail in such situations (causing a machine check or RTAS failure). Fix this by changing the SLIST into an STAILQ, and inserting new CPUs at the end. Reviewed by: jhb
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Sat Apr 30 20:49:00 2011 UTC (9 months, 1 week ago) by marcel
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SVN rev 221271 on 2011-04-30 20:49:00Z by marcel Stop linking against a direct-mapped virtual address and instead use the PBVM. This eliminates the implied hardcoding of the physical address at which the kernel needs to be loaded. Using the PBVM makes it possible to load the kernel irrespective of the physical memory organization and allows us to replicate kernel text on NUMA machines. While here, reduce the direct-mapped page size to the kernel's page size so that we can support memory attributes better.
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Mon Mar 21 18:20:53 2011 UTC (10 months, 3 weeks ago) by marcel
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SVN rev 219841 on 2011-03-21 18:20:53Z by marcel Fix switching to physical mode as part of calling into EFI runtime services or PAL procedures. The new implementation is based on specific functions that are known to be called in certain scenarios only. This in particular fixes the PAL call to obtain information about translation registers. In general, the new implementation does not bank on virtual addresses being direct-mapped and will work when the kernel uses PBVM. When new scenarios need to be supported, new functions are added if the existing functions cannot be changed to handle the new scenario. If a single generic implementation is possible, it will become clear in due time. While here, change bootinfo to a pointer type in anticipation of future development.
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Fri Mar 18 15:36:28 2011 UTC (10 months, 3 weeks ago) by marcel
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SVN rev 219741 on 2011-03-18 15:36:28Z by marcel Use VM_MAXUSER_ADDRESS rather than VM_MAX_ADDRESS when we talk about the bounds of user space. Redefine VM_MAX_ADDRESS as ~0UL, even though it's not used anywhere in the source tree.
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Tue Mar 15 08:20:59 2011 UTC (10 months, 3 weeks ago) by pluknet
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SVN rev 219662 on 2011-03-15 08:20:59Z by pluknet
MFC kern.msgbufsize: r217688-217689,r217709,r218666-218667,r218913.
Note, that arm/{s3c2xx0,econa} exist only in head, thus not merged.
r217688:
Make MSGBUF_SIZE kernel option a loader tunable kern.msgbufsize.
r217689:
Add kern.msgbufsize default setting to /boot/defaults/loader.conf.
r217709,218666-218667,218913 by marcel, cognet:
Fix up for various arm subtargets: call init_param1() before we use
msgbufsize, now that the size of the message buffer is a tunable.
Reviewed by: marcel
Approved by: avg (mentor)
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Fri Mar 11 18:56:55 2011 UTC (11 months ago) by mdf
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SVN rev 219523 on 2011-03-11 18:56:55Z by mdf Mostly revert r219468, as I had misremembered the C standard regarding the size of an extern array. Keep one change from strncpy to strlcpy.
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Thu Mar 10 22:56:00 2011 UTC (11 months ago) by mdf
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SVN rev 219468 on 2011-03-10 22:56:00Z by mdf Use MAXPATHLEN rather than the size of an extern array when copying the kernel name. Also consistenly use strlcpy(). Suggested by: Warner Losh
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Tue Jan 25 22:08:43 2011 UTC (12 months, 2 weeks ago) by jhb
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SVN rev 217856 on 2011-01-25 22:08:43Z by jhb MFC 214835: Adjust the order of operations in spinlock_enter() and spinlock_exit() to work properly with single-stepping in a kernel debugger.
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Tue Jan 25 22:08:22 2011 UTC (12 months, 2 weeks ago) by jhb
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SVN rev 217855 on 2011-01-25 22:08:22Z by jhb MFC 214835: Adjust the order of operations in spinlock_enter() and spinlock_exit() to work properly with single-stepping in a kernel debugger.
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Fri Jan 21 10:26:26 2011 UTC (12 months, 2 weeks ago) by pluknet
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SVN rev 217688 on 2011-01-21 10:26:26Z by pluknet Make MSGBUF_SIZE kernel option a loader tunable kern.msgbufsize. Submitted by: perryh pluto.rain.com (previous version) Reviewed by: jhb Approved by: kib (mentor) Tested by: universe
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Tue Dec 21 17:10:29 2010 UTC (13 months, 2 weeks ago) by kensmith
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SVN rev 216618 on 2010-12-21 17:10:29Z by kensmith Copy stable/7 to releng/7.4 in preparation for FreeBSD-7.4 release. Approved by: re (implicit)
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Tue Dec 21 17:09:25 2010 UTC (13 months, 2 weeks ago) by kensmith
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SVN rev 216617 on 2010-12-21 17:09:25Z by kensmith Copy stable/8 to releng/8.2 in preparation for FreeBSD-8.2 release. Approved by: re (implicit)
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Tue Nov 9 20:41:10 2010 UTC (15 months ago) by jhb
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SVN rev 215052 on 2010-11-09 20:41:10Z by jhb Remove unused includes of <sys/mutex.h> and <machine/mutex.h>.
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Fri Nov 5 13:42:58 2010 UTC (15 months ago) by jhb
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SVN rev 214835 on 2010-11-05 13:42:58Z by jhb Adjust the order of operations in spinlock_enter() and spinlock_exit() to work properly with single-stepping in a kernel debugger. Specifically, these routines have always disabled interrupts before increasing the nesting count and restored the prior state of interrupts after decreasing the nesting count to avoid problems with a nested interrupt not disabling interrupts when acquiring a spin lock. However, trap interrupts for single-stepping can still occur even when interrupts are disabled. Now the saved state of interrupts is not saved in the thread until after interrupts have been disabled and the nesting count has been increased. Similarly, the saved state from the thread cannot be read once the nesting count has been decreased to zero. To fix this, use temporary variables to store interrupt state and shuffle it between the thread's MD area and the appropriate registers. In cooperation with: bde MFC after: 1 month
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Wed Jun 30 18:03:42 2010 UTC (19 months, 1 week ago) by jhb
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SVN rev 209613 on 2010-06-30 18:03:42Z by jhb Move prototypes for kern_sigtimedwait() and kern_sigprocmask() to <sys/syscallsubr.h> where all other kern_<syscall> prototypes live.
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Mon Jun 14 02:09:06 2010 UTC (19 months, 4 weeks ago) by kensmith
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SVN rev 209145 on 2010-06-14 02:09:06Z by kensmith Copy stable/8 to releng/8.1 in preparation for 8.1-RC1. Approved by: re (implicit)
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Wed Apr 7 02:24:41 2010 UTC (22 months ago) by nwhitehorn
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SVN rev 206336 on 2010-04-07 02:24:41Z by nwhitehorn MFC r205014,205015: Provide groundwork for 32-bit binary compatibility on non-x86 platforms, for upcoming 64-bit PowerPC and MIPS support. This renames the COMPAT_IA32 option to COMPAT_FREEBSD32, removes some IA32-specific code from MI parts of the kernel and enhances the freebsd32 compatibility code to support big-endian platforms. This MFC is required for MFCs of later changes to the freebsd32 compatibility from HEAD. Requested by: kib
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Wed Mar 31 05:05:28 2010 UTC (22 months, 1 week ago) by marcel
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SVN rev 205960 on 2010-03-31 05:05:28Z by marcel MFC rev 199727, 200888, 201031, 202904, 203054, 203106, 203572, 203884, 204183, 204184, 204185, 204425, 204904, 204905, 205172, 205234, 205357, 205428, 205429, 205431, 205432, 205433, 205434, 205435, 205454, 205665, 205713, 205723, 205726 and 205727: Bring ia64 machine-dependent changes from 9-current to 8-stable.
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Fri Mar 26 00:53:13 2010 UTC (22 months, 2 weeks ago) by nwhitehorn
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SVN rev 205660 on 2010-03-26 00:53:13Z by nwhitehorn Fix the ia64 build. Pointy hat to: me
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Thu Mar 25 14:24:00 2010 UTC (22 months, 2 weeks ago) by nwhitehorn
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SVN rev 205642 on 2010-03-25 14:24:00Z by nwhitehorn Change the arguments of exec_setregs() so that it receives a pointer to the image_params struct instead of several members of that struct individually. This makes it easier to expand its arguments in the future without touching all platforms. Reviewed by: jhb
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Sat Mar 20 04:22:22 2010 UTC (22 months, 3 weeks ago) by marcel
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SVN rev 205357 on 2010-03-20 04:22:22Z by marcel Don't check for boot_verbose in the environment. The loader does that already and sets RB_VERBOSE. The loader has always done it.
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Wed Mar 17 00:37:15 2010 UTC (22 months, 3 weeks ago) by marcel
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SVN rev 205234 on 2010-03-17 00:37:15Z by marcel
Revamp the interrupt code based on the previous commit:
o Introduce XIV, eXternal Interrupt Vector, to differentiate from
the interrupts vectors that are offsets in the IVT (Interrupt
Vector Table). There's a vector for external interrupts, which
are based on the XIVs.
o Keep track of allocated and reserved XIVs so that we can assign
XIVs without hardcoding anything. When XIVs are allocated, an
interrupt handler and a class is specified for the XIV. Classes
are:
1. architecture-defined: XIV 15 is returned when no external
interrupt are pending,
2. platform-defined: SAL reports which XIV is used to wakeup
an AP (typically 0xFF, but it's 0x12 for the Altix 350).
3. inter-processor interrupts: allocated for SMP support and
non-redirectable.
4. device interrupts (i.e. IRQs): allocated when devices are
discovered and are redirectable.
o Rewrite the central interrupt handler to call the per-XIV
interrupt handler and rename it to ia64_handle_intr(). Move
the per-XIV handler implementation to the file where we have
the XIV allocation/reservation. Clock interrupt handling is
moved to clock.c. IPI handling is moved to mp_machdep.c.
o Drop support for the Intel 8259A because it was broken. When
XIV 0 is received, the CPU should initiate an INTA cycle to
obtain the interrupt vector of the 8259-based interrupt. In
these cases the interrupt controller we should be talking to
WRT to masking on signalling EOI is the 8259 and not the I/O
SAPIC. This requires adriver for the Intel 8259A which isn't
available for ia64. Thus stop pretending to support ExtINTs
and instead panic() so that if we come across hardware that
has an Intel 8259A, so have something real to work with.
o With XIVs for IPIs dynamically allocatedi and also based on
priority, define the IPI_* symbols as variables rather than
constants. The variable holds the XIV allocated for the IPI.
o IPI_STOP_HARD delivers a NMI if possible. Otherwise the XIV
assigned to IPI_STOP is delivered.
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Mon Mar 15 16:53:09 2010 UTC (22 months, 3 weeks ago) by marcel
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SVN rev 205172 on 2010-03-15 16:53:09Z by marcel Have cpu_throw() loop on blocked_lock as well. This bug has existed a long time and has gone unnoticed just as long, because I kept using sched_4bsd (due to sched_ule not working with preemption), but GENERIC had sched_ule by default -- including SMP. While here, remove unused inclusion of <machine/clock.h>, remove totally bogus inclusion of <i386/include/specialreg.h>.
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Thu Mar 11 14:49:06 2010 UTC (23 months ago) by nwhitehorn
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SVN rev 205014 on 2010-03-11 14:49:06Z by nwhitehorn Provide groundwork for 32-bit binary compatibility on non-x86 platforms, for upcoming 64-bit PowerPC and MIPS support. This renames the COMPAT_IA32 option to COMPAT_FREEBSD32, removes some IA32-specific code from MI parts of the kernel and enhances the freebsd32 compatibility code to support big-endian platforms. Reviewed by: kib, jhb
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Sat Feb 20 22:43:12 2010 UTC (23 months, 2 weeks ago) by marcel
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SVN rev 204148 on 2010-02-20 22:43:12Z by marcel MFC rev 203883: o Eliminate IA64_PHYS_TO_RR6 by calling bus_space_map() or pmap_mapdev(). o Implement bus_space_map() in terms of pmap_mapdev(). o Have ia64_pib hold the uncached virtual address of the PIB.
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Sun Feb 14 16:56:24 2010 UTC (23 months, 3 weeks ago) by marcel
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SVN rev 203883 on 2010-02-14 16:56:24Z by marcel
Some code churn:
o Eliminate IA64_PHYS_TO_RR6 and change all places where the macro is used
by calling either bus_space_map() or pmap_mapdev().
o Implement bus_space_map() in terms of pmap_mapdev() and implement
bus_space_unmap() in terms of pmap_unmapdev().
o Have ia64_pib hold the uncached virtual address of the processor interrupt
block throughout the kernel's life and access the elements of the PIB
through this structure pointer.
This is a non-functional change with the exception of using ia64_ld1() and
ia64_st8() to write to the PIB. We were still using assignments, for which
the compiler generates semaphore reads -- which cause undefined behaviour
for uncacheable memory. Note also that the memory barriers in ipi_send() are
critical for proper functioning.
With all the mapping of uncached memory done by pmap_mapdev(), we can keep
track of the translations and wire them in the CPU. This then eliminates
the need to reserve a whole region for uncached I/O and it eliminates
translation traps for device I/O accesses.
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Wed Feb 10 00:26:20 2010 UTC (2 years ago) by kensmith
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SVN rev 203736 on 2010-02-10 00:26:20Z by kensmith Copy stable/7 to releng/7.3 as part of the 7.3-RELEASE process. Approved by: re (implicit)
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Wed Jan 27 02:32:07 2010 UTC (2 years ago) by marcel
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SVN rev 203054 on 2010-01-27 02:32:07Z by marcel In cpu_switch(), use an atomic operation to set the td_lock of the old thread to the mutex that's passed. Pointed out by: attilio, jhb
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Sat Jan 23 23:16:50 2010 UTC (2 years ago) by marcel
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SVN rev 202904 on 2010-01-23 23:16:50Z by marcel Remove cpu_boot() and call efi_reset_system() directly from cpu_reset().
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Sun Jan 10 23:51:02 2010 UTC (2 years ago) by marcel
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SVN rev 202052 on 2010-01-10 23:51:02Z by marcel MFC rev 201269, 201373: o Revamp bus_space access functions (201269). o Change BUS_SPACE_MAXADDR from 2^32-1 to 2^64-1 (201373).
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Wed Dec 30 18:15:25 2009 UTC (2 years, 1 month ago) by marcel
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SVN rev 201269 on 2009-12-30 18:15:25Z by marcel
Revamp bus_space access functions:
o Optimize for memory mapped I/O by making all I/O port acceses function
calls and marking the test for the IA64_BUS_SPACE_IO tag with
__predict_false(). Implement the I/O port access functions in a new
file, called bus_machdep.c.
o Change the bus_space_handle_t for memory mapped I/O to the virtual
address rather than the physical address. This eliminates the PA->VA
translation for every I/O access. The handle for I/O port access is
still the port number.
o Move inb(), outb(), inw(), outw(), inl(), outl(), and their string
variants from cpufunc.h and define them in bus.h. On ia64 these are
not CPU functions at all. In bus.h they are merely aliases for the
new I/O port access functions defined in bus_machdep.h.
o Handle the ACPI resource bug in nexus_set_resource(). There we can
do it once so that we don't have to worry about it whenever we need
to write to an I/O port that is really a memory mapped address.
The upshot of this change is that the KBI is better defined and that I/O
port access always involves a function call, allowing us to change the
actual implementation without breaking the KBI. For memory mapped I/O the
virtual address is abstracted, so that we can change the VA->PA mapping
in the kernel without causing an KBI breakage. The exception at this time
is for bus_space_map() and bus_space_unmap().
MFC after: 1 week.
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Sat Dec 26 04:29:38 2009 UTC (2 years, 1 month ago) by marcel
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SVN rev 201013 on 2009-12-26 04:29:38Z by marcel MFC rev 200889: Export the bus, cpu and itc frequencies under the hw.freq sysctl node.
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Wed Dec 23 04:48:42 2009 UTC (2 years, 1 month ago) by marcel
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SVN rev 200889 on 2009-12-23 04:48:42Z by marcel Export the bus, cpu and itc frequencies under the hw.freq sysctl node. The frequencies are in MHz (i.e. a value of 1000 represents 1GHz). The frequencies are rounded to the nearest whole MHz. While here, rename and re-type bus_frequency, processor_frequency and itc_frequency to bus_freq, cpu_freq and itc_freq and make them static. As unsigned integers, the hw.freq.cpu sysctl can more easily be made generic (across all architectures) making porting easier. MFC after: 3 days
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Sat Dec 19 11:31:28 2009 UTC (2 years, 1 month ago) by kib
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SVN rev 200722 on 2009-12-19 11:31:28Z by kib MFC r198507: Use kern_sigprocmask() instead of direct manipulation of td_sigmask to reschedule newly blocked signals. MFC r198590: Trapsignal() calls kern_sigprocmask() when delivering catched signal with proc lock held. MFC r198670: For trapsignal() and postsig(), kern_sigprocmask() is called with both process lock and curproc->p_sigacts->ps_mtx locked. Prevent lock recursion on ps_mtx in reschedule_signals().
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Sat Dec 12 05:14:40 2009 UTC (2 years, 1 month ago) by marcel
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SVN rev 200431 on 2009-12-12 05:14:40Z by marcel MFC rev 199893, 199941, 200200 and 200207: o Eliminate MAXCPU. o Revamp the PCPU structure.
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Mon Dec 7 06:41:27 2009 UTC (2 years, 2 months ago) by marcel
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SVN rev 200207 on 2009-12-07 06:41:27Z by marcel Define struct pcpu_md as the only MD field of struct pcpu (pc_acpi_id excluded, as it's used by MI code) and mode the sysctl variables from pcpu_stats to pcpu_md. Adjust all references accordingly. While nearby, change the PCPU sysctl tree so that they match the CPU device sysctl tree -- they are now children of a static node called "machdep.cpu" and are named only with their cpu ID.
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Fri Dec 4 18:29:59 2009 UTC (2 years, 2 months ago) by marcel
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SVN rev 200103 on 2009-12-04 18:29:59Z by marcel MFC rev 200051: Make sure bus space accesses use unorder memory loads and stores.
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Thu Dec 3 04:06:48 2009 UTC (2 years, 2 months ago) by marcel
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SVN rev 200051 on 2009-12-03 04:06:48Z by marcel Make sure bus space accesses use unorder memory loads and stores. Memory accesses are posted in program order by virtue of the uncacheable memory attribute. Since GCC, by default, adds acquire and release semantics to volatile memory loads and stores, we need to use inline assembly to guarantee it. With inline assembly, we don't need volatile pointers anymore. Itanium does not support semaphore instructions to uncacheable memory.
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Sat Nov 28 21:01:15 2009 UTC (2 years, 2 months ago) by marcel
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SVN rev 199893 on 2009-11-28 21:01:15Z by marcel Eliminate teh use of MAXCPU in static arrays of interrupt counters by adding statistics counters to the PCPU structure. Export the counters through sysctl by giving each PCPU structure its own sysctl context. While here, fix cnt.v_intr by not just having it count clock interrupts, but every interrupt and add more counters for each interrupt source.
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Tue Nov 24 03:32:42 2009 UTC (2 years, 2 months ago) by marcel
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SVN rev 199732 on 2009-11-24 03:32:42Z by marcel MFC r198733: Reimplement the lazy FP context switching... ...This change fixes the high FP inconsistency panics.
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Sat Oct 31 22:27:31 2009 UTC (2 years, 3 months ago) by marcel
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SVN rev 198733 on 2009-10-31 22:27:31Z by marcel
Reimplement the lazy FP context switching:
o Move all code into a single file for easier maintenance.
o Use a single global lock to avoid having to handle either
multiple locks or race conditions.
o Make sure to disable the high FP registers after saving
or dropping them.
o use msleep() to wait for the other CPU to save the high
FP registers.
This change fixes the high FP inconsistency panics.
A single global lock typically serializes too much, which may
be noticable when a lot of threads use the high FP registers,
but in that case it's probably better to switch the high FP
context synchronuously. Put differently: cpu_switch() should
switch the high FP registers if the incoming and outgoing
threads both use the high FP registers.
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Tue Oct 27 10:47:58 2009 UTC (2 years, 3 months ago) by kib
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SVN rev 198507 on 2009-10-27 10:47:58Z by kib In r197963, a race with thread being selected for signal delivery while in kernel mode, and later changing signal mask to block the signal, was fixed for sigprocmask(2) and ptread_exit(3). The same race exists for sigreturn(2), setcontext(2) and swapcontext(2) syscalls. Use kern_sigprocmask() instead of direct manipulation of td_sigmask to reschedule newly blocked signals, closing the race. Reviewed by: davidxu Tested by: pho MFC after: 1 month
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Sun Oct 25 01:10:29 2009 UTC (2 years, 3 months ago) by kensmith
Branches: RELENG_8_0
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SVN rev 198460 on 2009-10-25 01:10:29Z by kensmith Copy stable/8 to releng/8.0 as part of 8.0-RELEASE release procedure. Approved by: re (implicit)
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Sun Aug 16 02:12:13 2009 UTC (2 years, 5 months ago) by marcel
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SVN rev 196270 on 2009-08-16 02:12:13Z by marcel MFC rev 196268: Decouple ACPI CPU Ids from FreeBSD's cpuid. The ACPI Ids can be sparse, which causes a kernel assert. Approved by: re (kensmith)
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Sun Aug 16 01:43:08 2009 UTC (2 years, 5 months ago) by marcel
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SVN rev 196268 on 2009-08-16 01:43:08Z by marcel Decouple ACPI CPU Ids from FreeBSD's cpuid. The ACPI Ids can be sparse, which causes a kernel assert. Approved by: re (kensmith)
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Mon Aug 3 08:13:06 2009 UTC (2 years, 6 months ago) by kensmith
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SVN rev 196045 on 2009-08-03 08:13:06Z by kensmith Copy head to stable/8 as part of 8.0 Release cycle. Approved by: re (Implicit)
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Tue Jun 30 14:11:43 2009 UTC (2 years, 7 months ago) by avg
Branches: RELENG_7
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Branch point for: RELENG_7_4, RELENG_7_3
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SVN rev 195193 on 2009-06-30 14:11:43Z by avg MFC 179229 (alc), 195188: The VM system no longer uses setPQL2(). Remove it and its helpers. Drop unused extern declarations in amd64 that seem to have been related. Reviewed by: alc
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Tue Jun 23 22:42:39 2009 UTC (2 years, 7 months ago) by jeff
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Branch point for: RELENG_8
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SVN rev 194784 on 2009-06-23 22:42:39Z by jeff Implement a facility for dynamic per-cpu variables. - Modules and kernel code alike may use DPCPU_DEFINE(), DPCPU_GET(), DPCPU_SET(), etc. akin to the statically defined PCPU_*. Requires only one extra instruction more than PCPU_* and is virtually the same as __thread for builtin and much faster for shared objects. DPCPU variables can be initialized when defined. - Modules are supported by relocating the module's per-cpu linker set over space reserved in the kernel. Modules may fail to load if there is insufficient space available. - Track space available for modules with a one-off extent allocator. Free may block for memory to allocate space for an extent. Reviewed by: jhb, rwatson, kan, sam, grehan, marius, marcel, stas
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Mon May 18 18:44:54 2009 UTC (2 years, 8 months ago) by marcel
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SVN rev 192324 on 2009-05-18 18:44:54Z by marcel Rename ia64_invalidate_icache() to ia64_sync_icache(). We're not invalidating anything.
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Mon May 18 18:37:18 2009 UTC (2 years, 8 months ago) by marcel
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SVN rev 192323 on 2009-05-18 18:37:18Z by marcel Add cpu_flush_dcache() for use after non-DMA based I/O so that a possible future I-cache coherency operation can succeed. On ARM for example the L1 cache can be (is) virtually mapped, which means that any I/O that uses temporary mappings will not see the I-cache made coherent. On ia64 a similar behaviour has been observed. By flushing the D-cache, execution of binaries backed by md(4) and/or NFS work reliably. For Book-E (powerpc), execution over NFS exhibits SIGILL once in a while as well, though cpu_flush_dcache() hasn't been implemented yet. Doing an explicit D-cache flush as part of the non-DMA based I/O read operation eliminates the need to do it as part of the I-cache coherency operation itself and as such avoids pessimizing the DMA-based I/O read operations for which D-cache are already flushed/invalidated. It also allows future optimizations whereby the bcopy() followed by the D-cache flush can be integrated in a single operation, which could be implemented using on-chips DMA engines, by-passing the D-cache altogether.
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Wed Apr 15 03:14:26 2009 UTC (2 years, 9 months ago) by kensmith
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SVN rev 191087 on 2009-04-15 03:14:26Z by kensmith Create releng/7.2 from stable/7 in preparation for 7.2-RELEASE. Approved by: re (implicit)
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Tue Nov 25 02:59:29 2008 UTC (3 years, 2 months ago) by kensmith
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SVN rev 185281 on 2008-11-25 02:59:29Z by kensmith Create releng/7.1 in preparation for moving into RC phase of 7.1 release cycle. Approved by: re (implicit)
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Thu Oct 2 02:57:24 2008 UTC (3 years, 4 months ago) by kensmith
Branches: RELENG_6_4
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SVN rev 183531 on 2008-10-02 02:57:24Z by kensmith Create releng/6.4 from stable/6 in preparation for 6.4-RC1. Approved by: re (implicit)
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Tue Jul 22 14:27:47 2008 UTC (3 years, 6 months ago) by rwatson
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SVN rev 180695 on 2008-07-22 14:27:47Z by rwatson Merge r177253, r177255 from head to stable/7: In keeping with style(9)'s recommendations on macros, use a ';' after each SYSINIT() macro invocation. This makes a number of lightweight C parsers much happier with the FreeBSD kernel source, including cflow's prcc and lxr. Discussed with: imp, rink The requirement to place a ; after each SYSINIT definition has not been MFC'd, as this might break the compile third-party modules, but merging the actual ; additions reduces diffs against 8.x making it easier to merge other changes.
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Mon Jul 7 17:43:56 2008 UTC (3 years, 7 months ago) by marcel
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SVN rev 180354 on 2008-07-07 17:43:56Z by marcel Add inline function ia64_fc_i() to abstract inline assembly. Use the new inline function in ia64_invalidate_icache(). While there, add proper synchronization so that we know the fc.i instructions have taken effect when we return.
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Sun Jun 1 18:04:29 2008 UTC (3 years, 8 months ago) by marcel
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SVN rev 179479 on 2008-06-01 18:04:29Z by marcel Merge rev 179173: We can call ia64_flush_dirty() when the corresponding process is locked or not. As such, use PROC_LOCKED() to determine which case it is and lock the process when not. This is a manual merge. No merge history is created.
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Fri May 23 04:03:53 2008 UTC (3 years, 8 months ago) by alc
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The VM system no longer uses setPQL2(). Remove it and its helpers.
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Wed May 21 05:15:27 2008 UTC (3 years, 8 months ago) by marcel
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We can call ia64_flush_dirty() when the corresponding process is locked or not. As such, use PROC_LOCKED() to determine which case it is and lock the process when not.
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Sat Apr 26 03:50:24 2008 UTC (3 years, 9 months ago) by marcel
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MFC: Better implement I-cache invalidation. Revision Changes Path 1.25 +4 -0 src/sys/ia64/ia64/elf_machdep.c 1.235 +18 -5 src/sys/ia64/ia64/machdep.c 1.198 +37 -84 src/sys/ia64/ia64/pmap.c 1.28 +1 -0 src/sys/ia64/include/md_var.h
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Fri Apr 25 16:09:03 2008 UTC (3 years, 9 months ago) by marcel
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Unbreak previous commit. While here, refactor the code a bit.
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Fri Apr 25 05:18:48 2008 UTC (3 years, 9 months ago) by jeff
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- Add an integer argument to idle to indicate how likely we are to wake from idle over the next tick. - Add a new MD routine, cpu_wake_idle() to wakeup idle threads who are suspended in cpu specific states. This function can fail and cause the scheduler to fall back to another mechanism (ipi). - Implement support for mwait in cpu_idle() on i386/amd64 machines that support it. mwait is a higher performance way to synchronize cpus as compared to hlt & ipis. - Allow selecting the idle routine by name via sysctl machdep.idle. This replaces machdep.cpu_idle_hlt. Only idle routines supported by the current machine are permitted. Sponsored by: Nokia
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Thu Apr 24 22:42:00 2008 UTC (3 years, 9 months ago) by marcel
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MFC fix for PR ia64/118024 o Rename cpu_thread_setup() to cpu_thread_alloc() to better communicate that it relates to (is called by) thread_alloc() o Add cpu_thread_free() which is called from thread_free() to counter-act cpu_thread_alloc(). i386: Have cpu_thread_free() call cpu_thread_clean() to preserve behaviour. ia64: Have cpu_thread_free() call mtx_destroy() for the mutex initialized in cpu_thread_alloc(). files: sys/amd64/amd64/vm_machdep.c:1.256 sys/arm/arm/vm_machdep.c:1.35 sys/i386/i386/vm_machdep.c1.284 sys/ia64/ia64/machdep.c:1.227 sys/ia64/ia64/vm_machdep.c:1.95 sys/kern/kern_thread.c:1.260 sys/powerpc/powerpc/vm_machdep.c:1.117 sys/sparc64/sparc64/vm_machdep.c:1.77 sys/sun4v/sun4v/vm_machdep.c:1.8 sys/sys/proc.h:1.495
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Tue Apr 22 19:38:28 2008 UTC (3 years, 9 months ago) by phk
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Now that all platforms use genclock, shuffle things around slightly for better structure. Much of this is related to <sys/clock.h>, which should really have been called <sys/calendar.h>, but unless and until we need the name, the repocopy can wait. In general the kernel does not know about minutes, hours, days, timezones, daylight savings time, leap-years and such. All that is theoretically a matter for userland only. Parts of kernel code does however care: badly designed filesystems store timestamps in local time and RTC chips almost universally track time in a YY-MM-DD HH:MM:SS format, and sometimes in local timezone instead of UTC. For this we have <sys/clock.h> <sys/time.h> on the other hand, deals with time_t, timeval, timespec and so on. These know only seconds and fractions thereof. Move inittodr() and resettodr() prototypes to <sys/time.h>. Retain the names as it is one of the few surviving PDP/VAX references. Move startrtclock() to <machine/clock.h> on relevant platforms, it is a MD call between machdep.c/clock.c. Remove references to it elsewhere. Remove a lot of unnecessary <sys/clock.h> includes. Move the machdep.disable_rtc_set sysctl to subr_rtc.c where it belongs. XXX: should be kern.disable_rtc_set really, it's not MD.
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Tue Apr 15 05:02:42 2008 UTC (3 years, 9 months ago) by marcel
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Support and switch to the ULE scheduler: o Implement IPI_PREEMPT, o Set td_lock for the thread being switched out, o For ULE & SMP, loop while td_lock points to blocked_lock for the thread being switched in, o Enable ULE by default in GENERIC and SKI,
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Sun Mar 30 23:09:14 2008 UTC (3 years, 10 months ago) by marcel
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Better implement I-cache invalidation. The previous implementation was a kluge. This implementation matches the behaviour on powerpc and sparc64. While on the subject, make sure to invalidate the I-cache after loading a kernel module. MFC after: 2 weeks
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Sun Mar 30 09:19:07 2008 UTC (3 years, 10 months ago) by rwatson
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Merge amd64/machdep.c:1.680, amd64/mp_watchdog.c:1.6, uart_dev_at91usart.c:1.13, scsi_low.h:1.9, subr_ntoskrnl.c:1.94, OsdDebug.c:1.14, dcons_os.c:1.20, ofw_consle.c:1.37, dev/sio.c:1.473, syscons.c:1.454, uart_core.c:1.23, union_subr.c:1.96, i386/machdep.c:1.664, i386/mp_watchdog.c:1.6, ia64/machdep.c:1.228, kern_clock.c:1.206, kern_shutdown.c:1.186, subr_kdb.c:1.25, subr_witness.c:1.239, vfs_subr.c:1.711, ng_base.c:1.140, cbus/sio.c:1.247, pc98/machdep.c:1.399, aim/machdep.c:1.107, pswitch.c:1.7, mac_test.c:19.3, psycho.c:1.73, sparc64/machdep.c:1.140, sparc64/trap.c:1.89, hvcons.c:1.7, sun4v/machdep.c:1.17, sun4v/trap.c:1.17, kdb.h:1.6 from HEAD to RELENG_7: Add a new 'why' argument to kdb_enter(), and a set of constants to use for that argument. This will allow DDB to detect the broad category of reason why the debugger has been entered, which it can use for the purposes of deciding which DDB script to run. Assign approximate why values to all current consumers of the kdb_enter() interface. For ABI/KPI reasons, the MFC creates a new function, kdb_enter_why(), with the new argument, updating existing consumers to use that, preserving kdb_enter() with the current argument, and wrapping it around kdb_enter_why().
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Wed Mar 26 20:09:19 2008 UTC (3 years, 10 months ago) by phk
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Diff to: previous 1.233: preferred, colored
Changes since revision 1.233: +0 -6 lines
The "free-lance" timer in the i8254 is only used for the speaker these days, so de-generalize the acquire_timer/release_timer api to just deal with speakers. The new (optional) MD functions are: timer_spkr_acquire() timer_spkr_release() and timer_spkr_setfreq() the last of which configures the timer to generate a tone of a given frequency, in Hz instead of 1/1193182th of seconds. Drop entirely timer2 on pc98, it is not used anywhere at all. Move sysbeep() to kern/tty_cons.c and use the timer_spkr*() if they exist, and do nothing otherwise. Remove prototypes and empty acquire-/release-timer() and sysbeep() functions from the non-beeping archs. This eliminate the need for the speaker driver to know about i8254frequency at all. In theory this makes the speaker driver MI, contingent on the timer_spkr_*() functions existing but the driver does not know this yet and still attaches to the ISA bus. Syscons is more tricky, in one function, sc_tone(), it knows the hz and things are just fine. In the other function, sc_bell() it seems to get the period from the KDMKTONE ioctl in terms if 1/1193182th second, so we hardcode the 1193182 and leave it at that. It's probably not important. Change a few other sysbeep() uses which obviously knew that the argument was in terms of i8254 frequency, and leave alone those that look like people thought sysbeep() took frequency in hertz. This eliminates the knowledge of i8254_freq from all but the actual clock.c code and the prof_machdep.c on amd64 and i386, where I think it would be smart to ask for help from the timecounters anyway [TBD].
Revision 1.233: download - view: text, markup, annotated - select for diffs
Sun Mar 16 10:58:04 2008 UTC (3 years, 10 months ago) by rwatson
Branches: MAIN
Diff to: previous 1.232: preferred, colored
Changes since revision 1.232: +1 -1 lines
In keeping with style(9)'s recommendations on macros, use a ';' after each SYSINIT() macro invocation. This makes a number of lightweight C parsers much happier with the FreeBSD kernel source, including cflow's prcc and lxr. MFC after: 1 month Discussed with: imp, rink
Revision 1.232: download - view: text, markup, annotated - select for diffs
Wed Mar 12 22:14:14 2008 UTC (3 years, 10 months ago) by jeff
Branches: MAIN
Diff to: previous 1.231: preferred, colored
Changes since revision 1.231: +3 -4 lines
- Fix build breakage; there was a reference to a removed syscall in a KASSERT(). Attempt to cleanup the comment to reflect reality.
Revision 1.231: download - view: text, markup, annotated - select for diffs
Wed Mar 12 10:11:58 2008 UTC (3 years, 11 months ago) by jeff
Branches: MAIN
Diff to: previous 1.230: preferred, colored
Changes since revision 1.230: +0 -3 lines
Remove kernel support for M:N threading. While the KSE project was quite successful in bringing threading to FreeBSD, the M:N approach taken by the kse library was never developed to its full potential. Backwards compatibility will be provided via libmap.conf for dynamically linked binaries and static binaries will be broken.
Revision 1.225.4.2: download - view: text, markup, annotated - select for diffs
Thu Feb 14 22:51:51 2008 UTC (3 years, 11 months ago) by marcel
Branches: RELENG_7_0
CVS tags: RELENG_7_0_0_RELEASE
Diff to: previous 1.225.4.1: preferred, colored; branchpoint 1.225: preferred, colored; next MAIN 1.226: preferred, colored
Changes since revision 1.225.4.1: +6 -0 lines
MFC: machdep.c:1.230, pmap.c:1.197 On Montecito processors, the instruction cache is in fact not coherent with the data caches. Implement a quick fix to allow us to boot on Montecito, while I'm working on a better fix in the mean time. Approved by: re (kensmith - big thanks!)
Revision 1.225.2.2: download - view: text, markup, annotated - select for diffs
Thu Feb 14 19:15:46 2008 UTC (3 years, 11 months ago) by marcel
Branches: RELENG_7
Diff to: previous 1.225.2.1: preferred, colored; branchpoint 1.225: preferred, colored
Changes since revision 1.225.2.1: +6 -0 lines
Insta MFC: machdep.c:1.230, pmap.c:1.197 On Montecito processors, the instruction cache is in fact not coherent with the data caches. Implement a quick fix to allow us to boot on Montecito, while I'm working on a better fix in the mean time. Commit made on Montecito-based Itanium...
Revision 1.230: download - view: text, markup, annotated - select for diffs
Thu Feb 14 18:46:50 2008 UTC (3 years, 11 months ago) by marcel
Branches: MAIN
Diff to: previous 1.229: preferred, colored
Changes since revision 1.229: +6 -0 lines
On Montecito processors, the instruction cache is in fact not coherent with the data caches. Implement a quick fix to allow us to boot on Montecito, while I'm working on a better fix in the mean time. Commit made on Montecito-based Itanium...
Revision 1.229: download - view: text, markup, annotated - select for diffs
Mon Feb 4 02:21:33 2008 UTC (4 years ago) by marcel
Branches: MAIN
Diff to: previous 1.228: preferred, colored
Changes since revision 1.228: +6 -20 lines
Allocate a stack for thread0 and switch to it before calling mi_startup(). This frees up kstack for static PAL/SAL calls and double-fault handling.
Revision 1.225.4.1: download - view: text, markup, annotated - select for diffs
Sat Jan 19 18:15:04 2008 UTC (4 years ago) by kib
Branches: RELENG_7_0
Diff to: previous 1.225: preferred, colored
Changes since revision 1.225: +1 -1 lines
MFC fix for the panic("vm_thread_new: kstack allocation failed") and
silent NULL pointer dereference in the i386 and sparc64 pmap_pinit()
when the kmem_alloc_nofault() failed to allocate address space. Both
functions now return error instead of panicing or dereferencing NULL.
The reason for MFCing this so late in release cycle is, according to
marius@, because
> it fixes the crashing (though no panic) of the test suite
> of the graphic/OpenEXR port on sparc64. This test suite is run
> (and required to succeed) during the package build and that's
> why portmgr@ bitch about at it as OpenEXR is a dependency of KDE
> which in turn is supposed to end up on the release CD images.
Revisions MFCed:
1.677 of src/sys/amd64/amd64/machdep.c
1.592 of src/sys/amd64/amd64/pmap.c
1.88 of src/sys/arm/arm/pmap.c
1.27 of src/sys/arm/at91/kb920x_machdep.c
1.22 of src/sys/arm/sa11x0/assabet_machdep.c
1.8 of src/sys/arm/xscale/i80321/ep80219_machdep.c
1.29 of src/sys/arm/xscale/i80321/iq31244_machdep.c
1.3 of src/sys/arm/xscale/i8134x/crb_machdep.c
1.6 of src/sys/arm/xscale/ixp425/avila_machdep.c
1.41 of src/sys/compat/pecoff/imgact_pecoff.c
1.26 of src/sys/compat/svr4/imgact_svr4.c
1.660 of src/sys/i386/i386/machdep.c
1.596 of src/sys/i386/i386/pmap.c
1.68 of src/sys/i386/ibcs2/imgact_coff.c
1.56 of src/sys/i386/linux/imgact_linux.c
1.226 of src/sys/ia64/ia64/machdep.c
1.192 of src/sys/ia64/ia64/pmap.c
1.102 of src/sys/kern/imgact_aout.c
1.179 of src/sys/kern/imgact_elf.c
1.56 of src/sys/kern/imgact_gzip.c
1.310 of src/sys/kern/kern_exec.c
1.287 of src/sys/kern/kern_fork.c
1.236 of src/sys/kern/kern_kse.c
1.253 of src/sys/kern/kern_proc.c
1.352 of src/sys/kern/kern_sig.c
1.63 of src/sys/kern/kern_thr.c
1.257 of src/sys/kern/kern_thread.c
1.397 of src/sys/pc98/pc98/machdep.c
1.104 of src/sys/powerpc/powerpc/machdep.c
1.10 of src/sys/powerpc/powerpc/pmap_dispatch.c
1.139 of src/sys/sparc64/sparc64/machdep.c
1.167 of src/sys/sparc64/sparc64/pmap.c
1.16 of src/sys/sun4v/sun4v/machdep.c
1.40 of src/sys/sun4v/sun4v/pmap.c
1.493 of src/sys/sys/proc.h
1.78 of src/sys/sys/signalvar.h
1.80 of src/sys/vm/pmap.h
1.79 of src/sys/vm/vm_extern.h
1.226 of src/sys/vm/vm_glue.c
1.390 of src/sys/vm/vm_map.c
Requested by: marius
Tested by: Peter Holm, marius (make universe and sparc64 runs)
Approved by: re (kensmith)
Revision 1.225.2.1: download - view: text, markup, annotated - select for diffs
Fri Jan 18 10:02:50 2008 UTC (4 years ago) by kib
Branches: RELENG_7
Diff to: previous 1.225: preferred, colored
Changes since revision 1.225: +1 -1 lines
MFC fix for the panic("vm_thread_new: kstack allocation failed") and
silent NULL pointer dereference in the i386 and sparc64 pmap_pinit()
when the kmem_alloc_nofault() failed to allocate address space. Both
functions now return error instead of panicing or dereferencing NULL.
The reason for MFCing this so late in release cycle is, according to
marius@, because
> it fixes the crashing (though no panic) of the test suite
> of the graphic/OpenEXR port on sparc64. This test suite is run
> (and required to succeed) during the package build and that's
> why portmgr@ bitch about at it as OpenEXR is a dependency of KDE
> which in turn is supposed to end up on the release CD images.
Revisions MFCed:
1.677 of src/sys/amd64/amd64/machdep.c
1.592 of src/sys/amd64/amd64/pmap.c
1.88 of src/sys/arm/arm/pmap.c
1.27 of src/sys/arm/at91/kb920x_machdep.c
1.22 of src/sys/arm/sa11x0/assabet_machdep.c
1.8 of src/sys/arm/xscale/i80321/ep80219_machdep.c
1.29 of src/sys/arm/xscale/i80321/iq31244_machdep.c
1.3 of src/sys/arm/xscale/i8134x/crb_machdep.c
1.6 of src/sys/arm/xscale/ixp425/avila_machdep.c
1.41 of src/sys/compat/pecoff/imgact_pecoff.c
1.26 of src/sys/compat/svr4/imgact_svr4.c
1.660 of src/sys/i386/i386/machdep.c
1.596 of src/sys/i386/i386/pmap.c
1.68 of src/sys/i386/ibcs2/imgact_coff.c
1.56 of src/sys/i386/linux/imgact_linux.c
1.226 of src/sys/ia64/ia64/machdep.c
1.192 of src/sys/ia64/ia64/pmap.c
1.102 of src/sys/kern/imgact_aout.c
1.179 of src/sys/kern/imgact_elf.c
1.56 of src/sys/kern/imgact_gzip.c
1.310 of src/sys/kern/kern_exec.c
1.287 of src/sys/kern/kern_fork.c
1.236 of src/sys/kern/kern_kse.c
1.253 of src/sys/kern/kern_proc.c
1.352 of src/sys/kern/kern_sig.c
1.63 of src/sys/kern/kern_thr.c
1.257 of src/sys/kern/kern_thread.c
1.397 of src/sys/pc98/pc98/machdep.c
1.104 of src/sys/powerpc/powerpc/machdep.c
1.10 of src/sys/powerpc/powerpc/pmap_dispatch.c
1.139 of src/sys/sparc64/sparc64/machdep.c
1.167 of src/sys/sparc64/sparc64/pmap.c
1.16 of src/sys/sun4v/sun4v/machdep.c
1.40 of src/sys/sun4v/sun4v/pmap.c
1.493 of src/sys/sys/proc.h
1.78 of src/sys/sys/signalvar.h
1.80 of src/sys/vm/pmap.h
1.79 of src/sys/vm/vm_extern.h
1.226 of src/sys/vm/vm_glue.c
1.390 of src/sys/vm/vm_map.c
Requested by: marius
Tested by: Peter Holm, marius (make universe and sparc64 runs)
Approved by: re (kensmith)
Revision 1.228: download - view: text, markup, annotated - select for diffs
Tue Dec 25 17:51:58 2007 UTC (4 years, 1 month ago) by rwatson
Branches: MAIN
Diff to: previous 1.227: preferred, colored
Changes since revision 1.227: +2 -1 lines
Add a new 'why' argument to kdb_enter(), and a set of constants to use for that argument. This will allow DDB to detect the broad category of reason why the debugger has been entered, which it can use for the purposes of deciding which DDB script to run. Assign approximate why values to all current consumers of the kdb_enter() interface.
Revision 1.227: download - view: text, markup, annotated - select for diffs
Wed Nov 14 20:21:53 2007 UTC (4 years, 2 months ago) by marcel
Branches: MAIN
Diff to: previous 1.226: preferred, colored
Changes since revision 1.226: +1 -1 lines
o Rename cpu_thread_setup() to cpu_thread_alloc() to better communicate that it relates to (is called by) thread_alloc() o Add cpu_thread_free() which is called from thread_free() to counter-act cpu_thread_alloc(). i386: Have cpu_thread_free() call cpu_thread_clean() to preserve behaviour. ia64: Have cpu_thread_free() call mtx_destroy() for the mutex initialized in cpu_thread_alloc(). PR: ia64/118024
Revision 1.226: download - view: text, markup, annotated - select for diffs
Mon Nov 5 11:36:13 2007 UTC (4 years, 3 months ago) by kib
Branches: MAIN
Diff to: previous 1.225: preferred, colored
Changes since revision 1.225: +1 -1 lines
Fix for the panic("vm_thread_new: kstack allocation failed") and
silent NULL pointer dereference in the i386 and sparc64 pmap_pinit()
when the kmem_alloc_nofault() failed to allocate address space. Both
functions now return error instead of panicing or dereferencing NULL.
As consequence, vmspace_exec() and vmspace_unshare() returns the errno
int. struct vmspace arg was added to vm_forkproc() to avoid dealing
with failed allocation when most of the fork1() job is already done.
The kernel stack for the thread is now set up in the thread_alloc(),
that itself may return NULL. Also, allocation of the first process
thread is performed in the fork1() to properly deal with stack
allocation failure. proc_linkup() is separated into proc_linkup()
called from fork1(), and proc_linkup0(), that is used to set up the
kernel process (was known as swapper).
In collaboration with: Peter Holm
Reviewed by: jhb
Revision 1.225: download - view: text, markup, annotated - select for diffs
Sat Aug 4 19:33:27 2007 UTC (4 years, 6 months ago) by marcel
Branches: MAIN
CVS tags: RELENG_7_BP, RELENG_7_0_BP
Branch point for: RELENG_7_0, RELENG_7
Diff to: previous 1.224: preferred, colored
Changes since revision 1.224: +18 -16 lines
Replace "__asm __volatile()" by equivalent support functions from ia64_cpu.h. This improves readability and consistency and aids in auditing the code. Add data-serialization after writing to cr.tpr. Approved by: re (blanket)
Revision 1.224: download - view: text, markup, annotated - select for diffs
Mon Jul 30 22:12:53 2007 UTC (4 years, 6 months ago) by marcel
Branches: MAIN
Diff to: previous 1.223: preferred, colored
Changes since revision 1.223: +24 -0 lines
Explicitly map the VHPT on all processors. Previously we were merely lucky that the VHPT was mapped as a side-effect of mapping the kernel, but when there's enough physical memory, this may not at all be the case. Approved by: re (blanket)
Revision 1.223: download - view: text, markup, annotated - select for diffs
Sun Jun 10 23:39:07 2007 UTC (4 years, 8 months ago) by alc
Branches: MAIN
Diff to: previous 1.222: preferred, colored
Changes since revision 1.222: +3 -1 lines
Add the machine-specific definitions for configuring the new physical memory allocator. Set the size of phys_avail[] using one of these definitions. Approved by: re
Revision 1.222: download - view: text, markup, annotated - select for diffs
Sun Jun 10 16:53:00 2007 UTC (4 years, 8 months ago) by marcel
Branches: MAIN
Diff to: previous 1.221: preferred, colored
Changes since revision 1.221: +10 -0 lines
Work around a firmware bug in the HP rx2660, where in ACPI an I/O port is really a memory mapped I/O address. The bug is in the GAS that describes the address and in particular the SpaceId field. The field should not say the address is an I/O port when it clearly is not. With an additional check for the IA64_BUS_SPACE_IO case in the bus access functions, and the fact that I/O ports pretty much not used in general on ia64, make the calculation of the I/O port address a function. This avoids inlining the work-around into every driver, and also helps reduce overall code bloat.
Revision 1.221: download - view: text, markup, annotated - select for diffs
Sat Jun 9 01:19:08 2007 UTC (4 years, 8 months ago) by marcel
Branches: MAIN
Diff to: previous 1.220: preferred, colored
Changes since revision 1.220: +4 -3 lines
Physical memory regions can be larger than INT_MAX. Change size1 from an int to a long to avoid printing negative byte and page counts.
Revision 1.220: download - view: text, markup, annotated - select for diffs
Thu Jun 7 18:36:58 2007 UTC (4 years, 8 months ago) by marcel
Branches: MAIN
Diff to: previous 1.219: preferred, colored
Changes since revision 1.219: +0 -2 lines
Remove remaining references to pc_curtid missed in previous commit.
Revision 1.219: download - view: text, markup, annotated - select for diffs
Thu Jun 7 01:53:29 2007 UTC (4 years, 8 months ago) by davidxu
Branches: MAIN
Diff to: previous 1.218: preferred, colored
Changes since revision 1.218: +0 -1 lines
Fix compiling error.
Revision 1.218: download - view: text, markup, annotated - select for diffs
Mon Jun 4 23:58:47 2007 UTC (4 years, 8 months ago) by jeff
Branches: MAIN
Diff to: previous 1.217: preferred, colored
Changes since revision 1.217: +1 -1 lines
Commit 13/14 of sched_lock decomposition. - Add a new parameter to cpu_switch() that is used to release the lock on the outgoing thread and properly acquire the lock on the incoming thread. This parameter is not required for schedulers that don't do per-cpu locking and architectures which do not support it may continue to use the 4BSD scheduler. This feature is presently not supported on ia64 Tested by: kris, current@ Tested on: i386, amd64, ULE, 4BSD, libthr, libkse, PREEMPTION, etc. Discussed with: kris, attilio, kmacy, jhb, julian, bde (small parts each)
Revision 1.217: download - view: text, markup, annotated - select for diffs
Thu May 31 22:52:12 2007 UTC (4 years, 8 months ago) by attilio
Branches: MAIN
Diff to: previous 1.216: preferred, colored
Changes since revision 1.216: +2 -2 lines
Revert VMCNT_* operations introduction. Probabilly, a general approach is not the better solution here, so we should solve the sched_lock protection problems separately. Requested by: alc Approved by: jeff (mentor)
Revision 1.216: download - view: text, markup, annotated - select for diffs
Fri May 18 07:10:45 2007 UTC (4 years, 8 months ago) by jeff
Branches: MAIN
Diff to: previous 1.215: preferred, colored
Changes since revision 1.215: +2 -2 lines
- define and use VMCNT_{GET,SET,ADD,SUB,PTR} macros for manipulating
vmcnts. This can be used to abstract away pcpu details but also changes
to use atomics for all counters now. This means sched lock is no longer
responsible for protecting counts in the switch routines.
Contributed by: Attilio Rao <attilio@FreeBSD.org>
Revision 1.215: download - view: text, markup, annotated - select for diffs
Sat May 5 19:50:27 2007 UTC (4 years, 9 months ago) by alc
Branches: MAIN
Diff to: previous 1.214: preferred, colored
Changes since revision 1.214: +0 -15 lines
Define every architecture as either VM_PHYSSEG_DENSE or VM_PHYSSEG_SPARSE depending on whether the physical address space is densely or sparsely populated with memory. The effect of this definition is to determine which of two implementations of vm_page_array and PHYS_TO_VM_PAGE() is used. The legacy implementation is obtained by defining VM_PHYSSEG_DENSE, and a new implementation that trades off time for space is obtained by defining VM_PHYSSEG_SPARSE. For now, all architectures except for ia64 and sparc64 define VM_PHYSSEG_DENSE. Defining VM_PHYSSEG_SPARSE on ia64 allows the entirety of my Itanium 2's memory to be used. Previously, only the first 1 GB could be used. Defining VM_PHYSSEG_SPARSE on sparc64 allows USIIIi-based systems to boot without crashing. This change is a combination of Nathan Whitehorn's patch and my own work in perforce. Discussed with: kmacy, marius, Nathan Whitehorn PR: 112194
Revision 1.214: download - view: text, markup, annotated - select for diffs
Wed Dec 20 04:40:39 2006 UTC (5 years, 1 month ago) by davidxu
Branches: MAIN
Diff to: previous 1.213: preferred, colored
Changes since revision 1.213: +3 -0 lines
Add a lwpid field into per-cpu structure, the lwpid represents current
running thread's id on each cpu. This allow us to add in-kernel adaptive
spin for user level mutex. While spinning in user space is possible,
without correct thread running state exported from kernel, it hardly
can be implemented efficiently without wasting cpu cycles, however
exporting thread running state unlikely will be implemented soon as
it has to design and stablize interfaces. This implementation is
transparent to user space, it can be disabled dynamically. With this
change, mutex ping-pong program's performance is improved massively on
SMP machine. performance of mysql super-smack select benchmark is increased
about 7% on Intel dual dual-core2 Xeon machine, it indicates on systems
which have bunch of cpus and system-call overhead is low (athlon64, opteron,
and core-2 are known to be fast), the adaptive spin does help performance.
Added sysctls:
kern.threads.umtx_dflt_spins
if the sysctl value is non-zero, a zero umutex.m_spincount will
cause the sysctl value to be used a spin cycle count.
kern.threads.umtx_max_spins
the sysctl sets upper limit of spin cycle count.
Tested on: Athlon64 X2 3800+, Dual Xeon 5130
Revision 1.213: download - view: text, markup, annotated - select for diffs
Wed Dec 6 06:34:55 2006 UTC (5 years, 2 months ago) by julian
Branches: MAIN
Diff to: previous 1.212: preferred, colored
Changes since revision 1.212: +3 -5 lines
Threading cleanup.. part 2 of several. Make part of John Birrell's KSE patch permanent.. Specifically, remove: Any reference of the ksegrp structure. This feature was never fully utilised and made things overly complicated. All code in the scheduler that tried to make threaded programs fair to unthreaded programs. Libpthread processes will already do this to some extent and libthr processes already disable it. Also: Since this makes such a big change to the scheduler(s), take the opportunity to rename some structures and elements that had to be moved anyhow. This makes the code a lot more readable. The ULE scheduler compiles again but I have no idea if it works. The 4bsd scheduler still reqires a little cleaning and some functions that now do ALMOST nothing will go away, but I thought I'd do that as a separate commit. Tested by David Xu, and Dan Eischen using libthr and libpthread.
Revision 1.212: download - view: text, markup, annotated - select for diffs
Sat Nov 18 23:15:25 2006 UTC (5 years, 2 months ago) by marcel
Branches: MAIN
Diff to: previous 1.211: preferred, colored
Changes since revision 1.211: +7 -5 lines
Since printf also has at least one critical section, we need to initialize pc_curthread. While here, rename early_pcpu to pcpu0 to be conistent (compare thread0 and proc0).
Revision 1.211: download - view: text, markup, annotated - select for diffs
Sat Nov 18 21:52:26 2006 UTC (5 years, 2 months ago) by marcel
Branches: MAIN
Diff to: previous 1.210: preferred, colored
Changes since revision 1.210: +8 -20 lines
Now that printf() needs the PCPU, set it up before we call printf(). Change the pc_pcb field from a pointer to struct pcb to struct pcb so that sizeof(struct pcb) includes the PCB we use for IPI_STOP. Statically declare early_pcb so that we don't have to allocate the PCB for thread0. This way we can setup the PCPU before cninit() and thus before we use printf().
Revision 1.210: download - view: text, markup, annotated - select for diffs
Fri Nov 3 04:06:17 2006 UTC (5 years, 3 months ago) by marcel
Branches: MAIN
Diff to: previous 1.209: preferred, colored
Changes since revision 1.209: +4 -3 lines
Make sure kern_envp is never NULL. If we don't get a pointer to the environment from the loader, use the static environment.
Revision 1.209: download - view: text, markup, annotated - select for diffs
Thu Oct 26 21:42:19 2006 UTC (5 years, 3 months ago) by jb
Branches: MAIN
Diff to: previous 1.208: preferred, colored
Changes since revision 1.208: +4 -0 lines
Make KSE a kernel option, turned on by default in all GENERIC kernel configs except sun4v (which doesn't process signals properly with KSE). Reviewed by: davidxu@
Revision 1.200.2.5: download - view: text, markup, annotated - select for diffs
Fri Sep 1 22:15:57 2006 UTC (5 years, 5 months ago) by marcel
Branches: RELENG_6
CVS tags: RELENG_6_4_BP, RELENG_6_3_BP, RELENG_6_3_0_RELEASE, RELENG_6_3, RELENG_6_2_BP, RELENG_6_2_0_RELEASE, RELENG_6_2
Branch point for: RELENG_6_4
Diff to: previous 1.200.2.4: preferred, colored; branchpoint 1.200: preferred, colored; next MAIN 1.201: preferred, colored
Changes since revision 1.200.2.4: +3 -3 lines
Diff reduction: MFC -r1.204.
Revision 1.200.2.4: download - view: text, markup, annotated - select for diffs
Sun Jun 25 19:07:51 2006 UTC (5 years, 7 months ago) by marcel
Branches: RELENG_6
Diff to: previous 1.200.2.3: preferred, colored; branchpoint 1.200: preferred, colored
Changes since revision 1.200.2.3: +8 -0 lines
MFC 1.208: Identify the dual-core Montecito.
Revision 1.208: download - view: text, markup, annotated - select for diffs
Thu Jun 22 00:56:58 2006 UTC (5 years, 7 months ago) by marcel
Branches: MAIN
Diff to: previous 1.207: preferred, colored
Changes since revision 1.207: +8 -0 lines
Identify the cual-core Montecito. MFC after: 3 days
Revision 1.200.2.3: download - view: text, markup, annotated - select for diffs
Tue Mar 7 18:08:09 2006 UTC (5 years, 11 months ago) by jhb
Branches: RELENG_6
CVS tags: RELENG_6_1_BP, RELENG_6_1_0_RELEASE, RELENG_6_1
Diff to: previous 1.200.2.2: preferred, colored; branchpoint 1.200: preferred, colored
Changes since revision 1.200.2.2: +2 -0 lines
MFC: Close some races between procfs/ptrace and exit1() by changing exit1() to block until any current PHOLD's are released. This includes Simplifying the cleanup code in kern_ptrace() and removing the now unnecessary vmspace ref counting magic from proc_rwmem(). Also, the locking for ptrace_single_step(), ptrace_set_pc(), and ptrace_clear_single_step() have been fixed to be consistent across the tree. Approved by: re (scottl)
Revision 1.200.2.2: download - view: text, markup, annotated - select for diffs
Wed Mar 1 16:30:51 2006 UTC (5 years, 11 months ago) by jhb
Branches: RELENG_6
Diff to: previous 1.200.2.1: preferred, colored; branchpoint 1.200: preferred, colored
Changes since revision 1.200.2.1: +1 -1 lines
MFC: Fix the hw.realmem sysctl on alpha, ia64, and sparc64. Approved by: re (scottl)
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Wed Feb 22 18:57:49 2006 UTC (5 years, 11 months ago) by jhb
Branches: MAIN
Diff to: previous 1.206: preferred, colored
Changes since revision 1.206: +2 -0 lines
Close some races between procfs/ptrace and exit(2): - Reorder the events in exit(2) slightly so that we trigger the S_EXIT stop event earlier. After we have signalled that, we set P_WEXIT and then wait for any processes with a hold on the vmspace via PHOLD to release it. PHOLD now KASSERT()'s that P_WEXIT is clear when it is invoked, and PRELE now does a wakeup if P_WEXIT is set and p_lock drops to zero. - Change proc_rwmem() to require that the processing read from has its vmspace held via PHOLD by the caller and get rid of all the junk to screw around with the vmspace reference count as we no longer need it. - In ptrace() and pseudofs(), treat a process with P_WEXIT set as if it doesn't exist. - Only do one PHOLD in kern_ptrace() now, and do it earlier so it covers FIX_SSTEP() (since on alpha at least this can end up calling proc_rwmem() to clear an earlier single-step simualted via a breakpoint). We only do one to avoid races. Also, by making the EINVAL error for unknown requests be part of the default: case in the switch, the various switch cases can now just break out to return which removes a _lot_ of duplicated PRELE and proc unlocks, etc. Also, it fixes at least one bug where a LWP ptrace command could return EINVAL with the proc lock still held. - Changed the locking for ptrace_single_step(), ptrace_set_pc(), and ptrace_clear_single_step() to always be called with the proc lock held (it was a mixed bag previously). Alpha and arm have to drop the lock while the mess around with breakpoints, but other archs avoid extra lock release/acquires in ptrace(). I did have to fix a couple of other consumers in kern_kse and a few other places to hold the proc lock and PHOLD. Tested by: ps (1 mostly, but some bits of 2-4 as well) MFC after: 1 week
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Tue Feb 14 14:50:10 2006 UTC (5 years, 11 months ago) by jhb
Branches: MAIN
Diff to: previous 1.205: preferred, colored
Changes since revision 1.205: +1 -1 lines
Fix the hw.realmem sysctl. The global realmem variable is a count of pages, not a count of bytes. The sysctl handler for hw.realmem already uses ctob() to convert realmem from pages to bytes. Thus, on archs that were storing a byte count in the realmem variable, hw.realmem was inflated. Reported by: Valerio daelli valerio dot daelli at gmail dot com (alpha) MFC after: 3 days
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Sat Dec 31 14:39:18 2005 UTC (6 years, 1 month ago) by netchild
Branches: MAIN
Diff to: previous 1.204: preferred, colored
Changes since revision 1.204: +8 -0 lines
MI changes: - provide an interface (macros) to the page coloring part of the VM system, this allows to try different coloring algorithms without the need to touch every file [1] - make the page queue tuning values readable: sysctl vm.stats.pagequeue - autotuning of the page coloring values based upon the cache size instead of options in the kernel config (disabling of the page coloring as a kernel option is still possible) MD changes: - detection of the cache size: only IA32 and AMD64 (untested) contains cache size detection code, every other arch just comes with a dummy function (this results in the use of default values like it was the case without the autotuning of the page coloring) - print some more info on Intel CPU's (like we do on AMD and Transmeta CPU's) Note to AMD owners (IA32 and AMD64): please run "sysctl vm.stats.pagequeue" and report if the cache* values are zero (= bug in the cache detection code) or not. Based upon work by: Chad David <davidc@acns.ab.ca> [1] Reviewed by: alc, arch (in 2004) Discussed with: alc, Chad David, arch (in 2004)
Revision 1.204: download - view: text, markup, annotated - select for diffs
Tue Dec 6 11:19:37 2005 UTC (6 years, 2 months ago) by ru
Branches: MAIN
Diff to: previous 1.203: preferred, colored
Changes since revision 1.203: +3 -3 lines
Fix -Wundef warnings from compiling GENERIC and LINT kernels of all architectures.
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Fri Oct 14 12:43:45 2005 UTC (6 years, 3 months ago) by davidxu
Branches: MAIN
Diff to: previous 1.202: preferred, colored
Changes since revision 1.202: +10 -21 lines
1. Change prototype of trapsignal and sendsig to use ksiginfo_t *, most changes in MD code are trivial, before this change, trapsignal and sendsig use discrete parameters, now they uses member fields of ksiginfo_t structure. For sendsig, this change allows us to pass POSIX realtime signal value to user code. 2. Remove cpu_thread_siginfo, it is no longer needed because we now always generate ksiginfo_t data and feed it to libpthread. 3. Add p_sigqueue to proc structure to hold shared signals which were blocked by all threads in the proc. 4. Add td_sigqueue to thread structure to hold all signals delivered to thread. 5. i386 and amd64 now return POSIX standard si_code, other arches will be fixed. 6. In this sigqueue implementation, pending signal set is kept as before, an extra siginfo list holds additional siginfo_t data for signals. kernel code uses psignal() still behavior as before, it won't be failed even under memory pressure, only exception is when deleting a signal, we should call sigqueue_delete to remove signal from sigqueue but not SIGDELSET. Current there is no kernel code will deliver a signal with additional data, so kernel should be as stable as before, a ksiginfo can carry more information, for example, allow signal to be delivered but throw away siginfo data if memory is not enough. SIGKILL and SIGSTOP have fast path in sigqueue_add, because they can not be caught or masked. The sigqueue() syscall allows user code to queue a signal to target process, if resource is unavailable, EAGAIN will be returned as specification said. Just before thread exits, signal queue memory will be freed by sigqueue_flush. Current, all signals are allowed to be queued, not only realtime signals. Earlier patch reviewed by: jhb, deischen Tested on: i386, amd64
Revision 1.200.2.1: download - view: text, markup, annotated - select for diffs
Tue Sep 13 21:07:14 2005 UTC (6 years, 4 months ago) by marcel
Branches: RELENG_6
CVS tags: RELENG_6_0_BP, RELENG_6_0_0_RELEASE, RELENG_6_0
Diff to: previous 1.200: preferred, colored
Changes since revision 1.200: +30 -13 lines
Mega-MFC: Add SMP support and enable it by default. This includes: conf/GENERIC: 1.73, 1.53 ia64/exception.S: 1.57 ia64/interrupt.c: 1.50, 1.51 ia64/machdep.c: 1.201, 1.202 ia64/mp_machdep.c: 1.56, 1.57, 1.58 ia64/pmap.c: 1.161, 1.162, 1.164, 1.165, 1.166 ia64/sal.c: 1.15 ia64/trap.c: 1.114, 1.115 ia64/vm_machdep.c: 1.91, 1.92 include/ia64_cpu.h: 1.20 include/param.h: 1.21 include/pmap.h: 1.25 include/proc.h: 1.15 include/smp.h: 1.10 Approved by: re (kensmith, scottl -- thanks!)
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Fri Sep 9 19:18:36 2005 UTC (6 years, 5 months ago) by marcel
Branches: MAIN
Diff to: previous 1.201: preferred, colored
Changes since revision 1.201: +7 -7 lines
Change the High FP lock from a sleep lock to a spin lock. We can take the lock from interrupt context, which causes an implicit lock order reversal. We've been using the lock carefully enough that making it a spin lock should not be harmful.
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Sat Aug 6 20:28:19 2005 UTC (6 years, 6 months ago) by marcel
Branches: MAIN
Diff to: previous 1.200: preferred, colored
Changes since revision 1.200: +30 -13 lines
Improve SMP support: o Allocate a VHPT per CPU. The VHPT is a hash table that the CPU uses to look up translations it can't find in the TLB. As such, the VHPT serves as a level 1 cache (the TLB being a level 0 cache) and best results are obtained when it's not shared between CPUs. The collision chain (i.e. the hash bucket) is shared between CPUs, as all buckets together constitute our collection of PTEs. To achieve this, the collision chain does not point to the first PTE in the list anymore, but to a hash bucket head structure. The head structure contains the pointer to the first PTE in the list, as well as a mutex to lock the bucket. Thus, each bucket is locked independently of each other. With at least 1024 buckets in the VHPT, this provides for sufficiently finei-grained locking to make the ssolution scalable to large SMP machines. o Add synchronisation to the lazy FP context switching. We do this with a seperate per-thread lock. On SMP machines the lazy high FP context switching without synchronisation caused inconsistent state, which resulted in a panic. Since the use of the high FP registers is not common, it's possible that races exist. The ia64 package build has proven to be a good stress test, so this will get plenty of exercise in the near future. o Don't use the local ID of the processor we want to send the IPI to as the argument to ipi_send(). use the struct pcpu pointer instead. The reason for this is that IPI delivery is unreliable. It has been observed that sending an IPI to a CPU causes it to receive a stray external interrupt. As such, we need a way to make the delivery reliable. The intended solution is to queue requests in the target CPU's per-CPU structure and use a single IPI to inform the CPU that there's a new entry in the queue. If that IPI gets lost, the CPU can check it's queue at any convenient time (such as for each clock interrupt). This also allows us to send requests to a CPU without interrupting it, if such would be beneficial. With these changes SMP is almost working. There are still some random process crashes and the machine can hang due to having the IPI lost that deals with the high FP context switch. The overhead of introducing the hash bucket head structure results in a performance degradation of about 1% for UP (extra pointer indirection). This is surprisingly small and is offset by gaining reasonably/good scalable SMP support.
Revision 1.200: download - view: text, markup, annotated - select for diffs
Tue Jul 5 17:12:18 2005 UTC (6 years, 7 months ago) by marcel
Branches: MAIN
CVS tags: RELENG_6_BP
Branch point for: RELENG_6
Diff to: previous 1.199: preferred, colored
Changes since revision 1.199: +51 -22 lines
Enhance ia64_flush_dirty() to handle the case in which td != curthread. This case is triggered with ptrace(2) and the PT_SETREGS function. Change the return type of the function to int so that errors can be passed on to the caller. Approved by: re (scottl)
Revision 1.199: download - view: text, markup, annotated - select for diffs
Mon Apr 4 21:53:54 2005 UTC (6 years, 10 months ago) by jhb
Branches: MAIN
Diff to: previous 1.198: preferred, colored
Changes since revision 1.198: +24 -0 lines
Divorce critical sections from spinlocks. Critical sections as denoted by critical_enter() and critical_exit() are now solely a mechanism for deferring kernel preemptions. They no longer have any affect on interrupts. This means that standalone critical sections are now very cheap as they are simply unlocked integer increments and decrements for the common case. Spin mutexes now use a separate KPI implemented in MD code: spinlock_enter() and spinlock_exit(). This KPI is responsible for providing whatever MD guarantees are needed to ensure that a thread holding a spin lock won't be preempted by any other code that will try to lock the same lock. For now all archs continue to block interrupts in a "spinlock section" as they did formerly in all critical sections. Note that I've also taken this opportunity to push a few things into MD code rather than MI. For example, critical_fork_exit() no longer exists. Instead, MD code ensures that new threads have the correct state when they are created. Also, we no longer try to fixup the idlethreads for APs in MI code. Instead, each arch sets the initial curthread and adjusts the state of the idle thread it borrows in order to perform the initial context switch. This change is largely a big NOP, but the cleaner separation it provides will allow for more efficient alternative locking schemes in other parts of the kernel (bare critical sections rather than per-CPU spin mutexes for per-CPU data for example). Reviewed by: grehan, cognet, arch@, others Tested on: i386, alpha, sparc64, powerpc, arm, possibly more
Revision 1.185.2.5: download - view: text, markup, annotated - select for diffs
Mon Mar 14 20:23:03 2005 UTC (6 years, 10 months ago) by marcel
Branches: RELENG_5
CVS tags: RELENG_5_5_BP, RELENG_5_5_0_RELEASE, RELENG_5_5, RELENG_5_4_BP, RELENG_5_4_0_RELEASE, RELENG_5_4
Diff to: previous 1.185.2.4: preferred, colored; branchpoint 1.185: preferred, colored; next MAIN 1.186: preferred, colored
Changes since revision 1.185.2.4: +2 -1 lines
MFC rev. 1.198: Make sure fpswa_interface equals NULL when bootinfo.bi_fpswa equals 0. PR: ia64/77591 Approved by: re (kensmith)
Revision 1.185.2.4: download - view: text, markup, annotated - select for diffs
Thu Mar 3 00:46:31 2005 UTC (6 years, 11 months ago) by wes
Branches: RELENG_5
Diff to: previous 1.185.2.3: preferred, colored; branchpoint 1.185: preferred, colored
Changes since revision 1.185.2.3: +2 -0 lines
MFC 'hw.physmem' sysctl. Submitted by: Nicko Dehaine <nicko@stbernard.com>
Revision 1.198: download - view: text, markup, annotated - select for diffs
Wed Mar 2 20:29:04 2005 UTC (6 years, 11 months ago) by marcel
Branches: MAIN
Diff to: previous 1.197: preferred, colored
Changes since revision 1.197: +2 -1 lines
Make sure fpswa_iface equals NULL when bootinfo.bi_fpswa equals 0. We need to be able to test for the (possible) non-existence of the FPSWA code. PR: ia64/77591 Submitted by: Christian Kandeler (christian dot kandeler at hob dot de) MFC after: 1 day
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Tue Mar 1 21:55:26 2005 UTC (6 years, 11 months ago) by wes
Branches: MAIN
Diff to: previous 1.196: preferred, colored
Changes since revision 1.196: +2 -0 lines
Attempt to doff the pointy hat: implement 'hw.realmem' on remaining architectures. Pointed out by O'Brien, ScottL via email. Reviewed by: obrien (various)
Revision 1.185.2.3: download - view: text, markup, annotated - select for diffs
Fri Feb 25 21:17:22 2005 UTC (6 years, 11 months ago) by njl
Branches: RELENG_5
Diff to: previous 1.185.2.2: preferred, colored; branchpoint 1.185: preferred, colored
Changes since revision 1.185.2.2: +49 -30 lines
MFC: cpu.h header and cpu_est_clockrate() functions for each arch.
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Sun Feb 6 01:55:07 2005 UTC (7 years ago) by njl
Branches: MAIN
Diff to: previous 1.195: preferred, colored
Changes since revision 1.195: +33 -28 lines
Finish the job of sorting all includes and fix the build by including malloc.h before proc.h on sparc64. Noticed by das@ Compiled on: alpha, amd64, i386, pc98, sparc64
Revision 1.185.2.2: download - view: text, markup, annotated - select for diffs
Sat Feb 5 01:01:47 2005 UTC (7 years ago) by das
Branches: RELENG_5
Diff to: previous 1.185.2.1: preferred, colored; branchpoint 1.185: preferred, colored
Changes since revision 1.185.2.1: +2 -5 lines
MFC: 2004-11-20 02:29:25 UTC U areas are going away, so don't allocate one for process 0. 2004-11-27 06:51:39 UTC Don't include sys/user.h merely for its side-effect of recursively including other headers.
Revision 1.195: download - view: text, markup, annotated - select for diffs
Fri Feb 4 06:38:58 2005 UTC (7 years ago) by marcel
Branches: MAIN
Diff to: previous 1.194: preferred, colored
Changes since revision 1.194: +1 -0 lines
Include sys/bus.h before sys/cpu.h. The latter needs device_t.
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Fri Feb 4 05:32:56 2005 UTC (7 years ago) by njl
Branches: MAIN
Diff to: previous 1.193: preferred, colored
Changes since revision 1.193: +12 -0 lines
Add an implementation of cpu_est_clockrate(9). This function estimates the current clock frequency for the given CPU id in units of Hz.
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Wed Dec 8 05:46:54 2004 UTC (7 years, 2 months ago) by marcel
Branches: MAIN
Diff to: previous 1.192: preferred, colored
Changes since revision 1.192: +7 -0 lines
Don't obtain the HCDP address directly from the bootinfo structure. Use a function to keep the details at arms length from uart(4).
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Sat Nov 27 06:51:36 2004 UTC (7 years, 2 months ago) by das
Branches: MAIN
Diff to: previous 1.191: preferred, colored
Changes since revision 1.191: +1 -1 lines
Don't include sys/user.h merely for its side-effect of recursively including other headers.
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Sat Nov 20 02:29:24 2004 UTC (7 years, 2 months ago) by das
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Diff to: previous 1.190: preferred, colored
Changes since revision 1.190: +1 -4 lines
U areas are going away, so don't allocate one for process 0. Reviewed by: arch@
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Wed Oct 6 02:43:28 2004 UTC (7 years, 4 months ago) by marcel
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Diff to: previous 1.189: preferred, colored
Changes since revision 1.189: +3 -0 lines
Add the Madison II, which is the second generation Madison. The Madison II is model 2 in the Itanium 2 family and has up to 9MB of L3 cache and clocks higher than 1.5Ghz. There's no LV variant AFAICT.
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Thu Sep 23 00:05:20 2004 UTC (7 years, 4 months ago) by marcel
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Diff to: previous 1.188: preferred, colored
Changes since revision 1.188: +14 -24 lines
Redefine a PTE as a 64-bit integral type instead of a struct of bit-fields. Unify the PTE defines accordingly and update all uses.
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Sun Sep 19 03:50:46 2004 UTC (7 years, 4 months ago) by marcel
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Diff to: previous 1.187: preferred, colored
Changes since revision 1.187: +27 -29 lines
MFp4: Completely remove the remaining EFI includes and add our own (type) definitions instead. While here, abstract more of the internals by providing interface functions.
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Fri Sep 17 22:19:41 2004 UTC (7 years, 4 months ago) by marcel
Branches: MAIN
Diff to: previous 1.186: preferred, colored
Changes since revision 1.186: +4 -5 lines
Provide our own FPSWA definitions, instead of depending on the Intel EFI headers and put them all in <machine/fpu.h>. The Intel EFI headers conflict with the Intel ACPI headers (duplicate type definitions), so are being phased out in the kernel.
Revision 1.185.2.1: download - view: text, markup, annotated - select for diffs
Thu Sep 9 10:03:19 2004 UTC (7 years, 5 months ago) by julian
Branches: RELENG_5
CVS tags: RELENG_5_3_BP, RELENG_5_3_0_RELEASE, RELENG_5_3
Diff to: previous 1.185: preferred, colored
Changes since revision 1.185: +1 -1 lines
MFC of: Refactor a bunch of scheduler code to give basically the same behaviour but with slightly cleaned up interfaces. (2004-09-05 02:09:54 UTC) see version 1.16 of sched.h for the original commit message. Approved by: re (scottl)
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Sun Sep 5 02:09:53 2004 UTC (7 years, 5 months ago) by julian
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Diff to: previous 1.185: preferred, colored
Changes since revision 1.185: +1 -1 lines
Refactor a bunch of scheduler code to give basically the same behaviour but with slightly cleaned up interfaces. The KSE structure has become the same as the "per thread scheduler private data" structure. In order to not make the diffs too great one is #defined as the other at this time. The KSE (or td_sched) structure is now allocated per thread and has no allocation code of its own. Concurrency for a KSEGRP is now kept track of via a simple pair of counters rather than using KSE structures as tokens. Since the KSE structure is different in each scheduler, kern_switch.c is now included at the end of each scheduler. Nothing outside the scheduler knows the contents of the KSE (aka td_sched) structure. The fields in the ksegrp structure that are to do with the scheduler's queueing mechanisms are now moved to the kg_sched structure. (per ksegrp scheduler private data structure). In other words how the scheduler queues and keeps track of threads is no-one's business except the scheduler's. This should allow people to write experimental schedulers with completely different internal structuring. A scheduler call sched_set_concurrency(kg, N) has been added that notifies teh scheduler that no more than N threads from that ksegrp should be allowed to be on concurrently scheduled. This is also used to enforce 'fainess' at this time so that a ksegrp with 10000 threads can not swamp a the run queue and force out a process with 1 thread, since the current code will not set the concurrency above NCPU, and both schedulers will not allow more than that many onto the system run queue at a time. Each scheduler should eventualy develop their own methods to do this now that they are effectively separated. Rejig libthr's kernel interface to follow the same code paths as linkse for scope system threads. This has slightly hurt libthr's performance but I will work to recover as much of it as I can. Thread exit code has been cleaned up greatly. exit and exec code now transitions a process back to 'standard non-threaded mode' before taking the next step. Reviewed by: scottl, peter MFC after: 1 week
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Mon Aug 16 18:54:22 2004 UTC (7 years, 5 months ago) by marcel
Branches: MAIN
CVS tags: RELENG_5_BP
Branch point for: RELENG_5
Diff to: previous 1.184: preferred, colored
Changes since revision 1.184: +3 -3 lines
Catch up with the drive-by renaming of IA32 to COMPAT_IA32. It must have been rush hour... While here, move COMPAT_IA32 from opt_global.h to opt_compat.h like on amd64. Consequently, it's unsafe to use the option in pcb.h. We now unconditionally have the ia32 specific registers in the PCB. This commit is untested.
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Wed Aug 11 05:29:13 2004 UTC (7 years, 6 months ago) by marcel
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Diff to: previous 1.183: preferred, colored
Changes since revision 1.183: +3 -0 lines
In set_regs(), flush the dirty registers onto the backingstore before we update the registers. That way we don't have any dirty registers to worry about and also know that bsp=bspstore, which makes updating the RSE related registers predictable. This is not the end of it. We need more validity checks, but for now this allows us to complete the gdb testsuite without crashing the kernel.
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Wed Aug 11 02:35:05 2004 UTC (7 years, 6 months ago) by marcel
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Diff to: previous 1.182: preferred, colored
Changes since revision 1.182: +28 -23 lines
Add __elfN(dump_thread). This function is called from __elfN(coredump) to allow dumping per-thread machine specific notes. On ia64 we use this function to flush the dirty registers onto the backingstore before we write out the PRSTATUS notes. Tested on: alpha, amd64, i386, ia64 & sparc64 Not tested on: arm, powerpc
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Sun Aug 8 00:28:07 2004 UTC (7 years, 6 months ago) by marcel
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Diff to: previous 1.181: preferred, colored
Changes since revision 1.181: +22 -2 lines
Implement single stepping when we leave the kernel through the EPC syscall path. The basic problem is that we cannot set the single stepping flag directly, because we don't leave the kernel via an interrupt return. So, we need another way to set the single stepping flag. The way we do this is by enabling the lower-privilege transfer trap, which gets raised when we drop the privilege level. However, since we're still running in kernel space (sec), we're not yet done. We clear the lower- privilege transfer trap, enable the taken-branch trap and continue exiting the kernel until we branch into user space. Given the current code, there's a total of two traps this way before we can raise SIGTRAP.
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Tue Jul 13 07:22:54 2004 UTC (7 years, 6 months ago) by davidxu
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Diff to: previous 1.180: preferred, colored
Changes since revision 1.180: +8 -0 lines
Add ptrace_clear_single_step(), alpha already has it for years, the function will be used by ptrace to clear a thread's single step state.
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Sat Jul 10 22:59:30 2004 UTC (7 years, 7 months ago) by marcel
Branches: MAIN
Diff to: previous 1.179: preferred, colored
Changes since revision 1.179: +9 -17 lines
Update for the KDB framework:
o ksym_start and ksym_end changed type to vm_offset_t.
o Make debugging support conditional upon KDB instead of DDB.
o Call kdb_enter() instead of breakpoint().
o Remove implementation of Debugger().
o Call kdb_trap() according to the new world order.
unwinder:
o s/db_active/kdb_active/g
o Various s/ddb/kdb/g
o Add support for unwinding from the PCB as well as the trapframe.
Abuse a spare field in the special register set to flag whether
the PCB was actually constructed from a trapframe so that we can
make the necessary adjustments.
md_var.h:
o Add RSE convenience macros.
o Add ia64_bsp_adjust() to add or subtract from BSP while taking
NaT collections into account.
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Sat Jul 10 19:55:59 2004 UTC (7 years, 7 months ago) by marcel
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Diff to: previous 1.178: preferred, colored
Changes since revision 1.178: +17 -0 lines
Implement makectx(). The makectx() function is used by KDB to create a PCB from a trapframe for purposes of unwinding the stack. The PCB is used as the thread context and all but the thread that entered the debugger has a valid PCB. This function can also be used to create a context for the threads running on the CPUs that have been stopped when the debugger got entered. This however is not done at the time of this commit.
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Fri Jun 11 11:16:23 2004 UTC (7 years, 8 months ago) by phk
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Diff to: previous 1.177: preferred, colored
Changes since revision 1.177: +2 -2 lines
Deorbit COMPAT_SUNOS. We inherited this from the sparc32 port of BSD4.4-Lite1. We have neither a sparc32 port nor a SunOS4.x compatibility desire these days.
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Wed Mar 10 22:23:20 2004 UTC (7 years, 11 months ago) by marcel
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Diff to: previous 1.176: preferred, colored
Changes since revision 1.176: +25 -12 lines
Identify the Deerfield processor. Deerfield is a low-voltage variant based on the Madison core and targeting the low end of the spectrum. Its clock frequency is 1Ghz, whereas Madison starts at 1.3Ghz. Since the CPUID information is the same for Madison and Deerfield, we use the clock frequency to identify the processor. Supposedly the Deerfield only uses 62W, which seems to be less than modern Xeon processors (about 70W) and about half what a Madison would need.
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Sun Feb 22 02:10:48 2004 UTC (7 years, 11 months ago) by marcel
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Diff to: previous 1.175: preferred, colored
Changes since revision 1.175: +0 -33 lines
Do not pre-map the I/O port space. On the Intel Tiger 4 this conflicts with a memory mapped I/O range that's immediately before it and is not 256MB aligned. As a result, when an address is accessed in the memory mapped range and a direct mapping is added for it, it overlaps with the pre-mapped I/O port space and causes a machine check. Based on a patch from: arun@
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Sat Jan 3 02:02:25 2004 UTC (8 years, 1 month ago) by davidxu
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Diff to: previous 1.174: preferred, colored
Changes since revision 1.174: +8 -8 lines
Make sigaltstack as per-threaded, because per-process sigaltstack state is useless for threaded programs, multiple threads can not share same stack. The alternative signal stack is private for thread, no lock is needed, the orignal P_ALTSTACK is now moved into td_pflags and renamed to TDP_ALTSTACK. For single thread or Linux clone() based threaded program, there is no semantic changed, because those programs only have one kernel thread in every process. Reviewed by: deischen, dfr
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Sun Dec 14 01:59:31 2003 UTC (8 years, 1 month ago) by marcel
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Diff to: previous 1.173: preferred, colored
Changes since revision 1.173: +10 -5 lines
In set_mcontext(), take into account that kse_switchin(2) will eventually be passed an async. context as well as a syscall context. While here, fix a serious bug in that if the trapframe is a syscall frame, but we're restoring an async context, we need to clear the FRAME_SYSCALL flag so that we leave the kernel via exception_restore.
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Sun Dec 7 20:47:32 2003 UTC (8 years, 2 months ago) by marcel
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Diff to: previous 1.172: preferred, colored
Changes since revision 1.172: +10 -26 lines
Simplify the contexts created by the kernel and remove the related flags. We now create asynchronous contexts or syscall contexts only. Syscall contexts differ from the minimal ABI dictated contexts by having the scratch registers saved and restored because that's where we keep the syscall arguments and syscall return values. Since this change affects KSE, have it use kse_switchin(2) for the "new" syscall context.
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Thu Nov 20 16:42:39 2003 UTC (8 years, 2 months ago) by marcel
Branches: MAIN
CVS tags: RELENG_5_2_BP, RELENG_5_2_1_RELEASE, RELENG_5_2_0_RELEASE, RELENG_5_2
Diff to: previous 1.171: preferred, colored
Changes since revision 1.171: +1 -1 lines
Set the ACPI processor Id in the PCPU structure so that CPU idling on SMP systems has a chance of working. This was a loose end of the implementation of the ACPI Cx idle states. Since our logical CPU Id is the ACPI processor Id, we do not need to jump through hoops to obtain it. Approved: re@ (jhb)
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Sat Nov 15 18:58:29 2003 UTC (8 years, 2 months ago) by njl
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Diff to: previous 1.170: preferred, colored
Changes since revision 1.170: +1 -0 lines
Add the pc_acpi_id PCPU member. The new acpi_cpu driver uses this to dereference the softc.
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Wed Nov 12 03:24:34 2003 UTC (8 years, 3 months ago) by marcel
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Diff to: previous 1.169: preferred, colored
Changes since revision 1.169: +0 -14 lines
Remove ia64_highfp_load() now that it's unused.
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Wed Nov 12 01:26:02 2003 UTC (8 years, 3 months ago) by marcel
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Diff to: previous 1.168: preferred, colored
Changes since revision 1.168: +4 -0 lines
Further work-out the handling of the high FP registers. The most important change is in cpu_switch() where we disable the high FP registers for the thread that we switch-out if the CPU currently has its high FP registers. This avoids that the high FP registers remain enabled for the thread even when the CPU has unloaded them or the thread migrated to another processor. Likewise, when we switch-in a thread of that has its high FP registers on the CPU, we enable them. This avoids an otherwise harmless, but unnecessary trap to have them enabled. The code that handles the disabled high FP trap (in trap()) has been turned into a critical section for the most part to avoid being preempted. If there's a race, we bail out and have the processor trap again if necessary. Avoid using the generic ia64_highfp_save() function when the context is predictable. The function adds unnecessary overhead. Don't use ia64_highfp_load() for the same reason. The function is now unused and can be removed. These changes make the lazy context switching of the high FP registers in an UP kernel functional.
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Tue Nov 11 09:53:37 2003 UTC (8 years, 3 months ago) by marcel
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Diff to: previous 1.167: preferred, colored
Changes since revision 1.167: +9 -2 lines
Save and restore the high FP registers in {g|s}_mcontext(). Note
that we currently do not keep track of whether the thread has
actually used the high FP registers before. If not, we should
not save them in the context which automaticly means that we
also would not restore them from the context. For now, do it
unconditionally so that we can reach functional completeness.
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Tue Nov 11 09:25:19 2003 UTC (8 years, 3 months ago) by marcel
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Diff to: previous 1.166: preferred, colored
Changes since revision 1.166: +10 -1 lines
Fix a nasty bug that got exposed when the sendsig() and sigreturn()
functions switched to using {g|s}et_mcontext(). The problem is that
sigreturn(), being a syscall, can be given an async. context (i.e.
one corresponding to an interrupt or trap). When this happens, we
try to return to user mode via epc_syscall_return with a trapframe
that can only be used to return to user mode via exception_restore.
To fix this, we check the frame's flags immediately prior to
epc_syscall_return and branch to exception_restore for non-syscall
frames. Modify the assertion in set_mcontext() to check that if
there's a mismatch, it's because of sigreturn().
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Mon Nov 10 05:28:05 2003 UTC (8 years, 3 months ago) by marcel
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Diff to: previous 1.165: preferred, colored
Changes since revision 1.165: +9 -5 lines
In get_mcontext(), do not update bspstore and ndirty in the trapframe. Only update them in the newly created context to reflect the state after copying the dirty registers onto the user stack. If we were to update the trapframe, we lose the state at entry into the kernel. We may need that after we create the context, such as for KSE upcalls. We have to update the trapframe after writing the dirty registers to the user stack for signal delivery to work. But this is best done in sendsig() itself where it applies, not in get_mcontext() where it's done unconditionally.
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Sun Nov 9 22:17:36 2003 UTC (8 years, 3 months ago) by marcel
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Diff to: previous 1.164: preferred, colored
Changes since revision 1.164: +34 -72 lines
Use get_mcontext() to construct the signal context in sendsig() and use set_mcontext() to restore the context in sigreturn(). Since we put the syscall number and the syscall arguments in the trapframe (we don't save the scratch registers for syscalls, which allows us to reuse the space to our advantage), create a MD specific flag so that we save the scratch registers even for syscalls. We would not be able to restart a syscall otherwise. The signal trampoline does not need to flush the regiters anymore, because get_mcontext() already handles that. In fact, if we set up the context correctly, we do not need to have a trampoline at all. This change however only minimally changes the trampoline code. In follow-up commits this can be further optimized. Note that normally we preserve cfm and iip in the trapframe created by the EPC syscall path when we restore a context in set_mcontext() because those fields are not normally set for a synchronuous context. The kernel puts the return address and frame info of the syscall stub in there. By preserving these fields we hide this detail from userland which allows us to use setcontext(2) for user created contexts. However, sigreturn() is commonly called from the trampoline, which means that if we preserve cfm and iip in all cases, we would return to the trampoline after the sigreturn(), which means we hit the safety net: we call exit(2). So, we do not preserve cfm and iip when we have a synchronous context that also has scratch registers (the uncommon context created by sendsig() only), under the assumption that if such a context is created in userland, something special is going on and the use of cfm and iip is then just another quirk. All this is invisible in the common case.
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Sun Nov 9 20:31:03 2003 UTC (8 years, 3 months ago) by marcel
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Diff to: previous 1.163: preferred, colored
Changes since revision 1.163: +2 -2 lines
Change the clear_ret argument of get_mcontext() to be a flags argument. Since all callers either passed 0 or 1 for clear_ret, define bit 0 in the flags for use as clear_ret. Reserve bits 1, 2 and 3 for use by MI code for possible (but unlikely) future use. The remaining bits are for use by MD code. This change is triggered by a need on ia64 to have another knob for get_mcontext().
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Tue Oct 28 19:38:26 2003 UTC (8 years, 3 months ago) by marcel
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Diff to: previous 1.162: preferred, colored
Changes since revision 1.162: +14 -22 lines
When switching the RSE to use the kernel stack as backing store, keep the RNAT bit index constant. The net effect of this is that there's no discontinuity WRT NaT collections which greatly simplifies certain operations. The cost of this is that there can be up to 504 bytes of unused stack between the true base of the kernel stack and the start of the RSE backing store. The cost of adjusting the backing store pointer to keep the RNAT bit index constant, for each kernel entry, is negligible. The primary reasons for this change are: 1. Asynchronuous contexts in KSE processes have the disadvantage of having to copy the dirty registers from the kernel stack onto the user stack. The implementation we had so far copied the registers one at a time without calculating NaT collection values. A process that used speculation would not work. Now that the RNAT bit index is constant, we can block-copy the registers from the kernel stack to the user stack without having to worry about NaT collections. They will be in the right place on the user stack. 2. The ndirty field in the trapframe is now also usable in userland. This was previously not the case because ndirty also includes the space occupied by NaT collections. The value could be off by 8, depending on the discontinuity. Now that the RNAT bit index is contants, we have exactly the same number of NaT collection points on the kernel stack as we would have had on the user stack if we didn't switch backing stores. 3. Debuggers and other applications that use ptrace(2) can now copy the dirty registers from the kernel stack (using ptrace(2)) and copy them whereever they want them (onto the user stack of the inferior as might be the case for gdb) without having to worry about NaT collections in the same way the kernel doesn't have to worry about them. There's a second order effect caused by the randomization of the base of the backing store, for it depends on the number of dirty registers the processor happened to have at the time of entry into the kernel. The second order effect is that the RSE will have a better cache utilization as compared to having the backing store always aligned at page boundaries. This has not been measured and may be in practice only minimally beneficial, if at all measurable.
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Fri Oct 24 06:52:21 2003 UTC (8 years, 3 months ago) by marcel
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Diff to: previous 1.161: preferred, colored
Changes since revision 1.161: +0 -25 lines
Remove ia64_pack_bundle() and ia64_unpack_bundle(). They are not used anymore.
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Fri Oct 24 04:56:58 2003 UTC (8 years, 3 months ago) by arun
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Diff to: previous 1.160: preferred, colored
Changes since revision 1.160: +1 -2 lines
Use a TR of size 1 << IA64_ID_PAGE_SHIFT instead of 16M to avoid overlapping TR/TC entries (which results in a machine check). Note that we don't look at the size of the memory descriptor, because it doesn't guarantee non-overlap. With this change, a UP kernel could boot on a Intel Tiger4 machine with the following options: options LOG2_ID_PAGE_SIZE=26 # 64M options LOG2_PAGE_SIZE=14 # 16K Approved by: marcel
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Tue Oct 21 01:13:49 2003 UTC (8 years, 3 months ago) by marcel
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Diff to: previous 1.159: preferred, colored
Changes since revision 1.159: +2 -2 lines
Remove md_bspstore from the MD fields of struct thread. Now that the backing store is at a fixed address, there's no need for a per-thread variable.
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Sat Oct 18 22:25:07 2003 UTC (8 years, 3 months ago) by njl
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Diff to: previous 1.158: preferred, colored
Changes since revision 1.158: +11 -2 lines
Add the cpu_idle_hook() function pointer so that other idlers can be hooked at runtime. Make C1 sleep (e.g., HLT) be the default. This prepares the way for further ACPI sleep states.
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Fri Oct 17 02:24:59 2003 UTC (8 years, 3 months ago) by marcel
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Diff to: previous 1.157: preferred, colored
Changes since revision 1.157: +9 -1 lines
Implement cpu_idle() on ia64. We put the processor in a lightweight halt state that minimizes power consumption while still preserving cache and TLB coherency. Halting the processor is not conditional at this time. Tested with UP and SMP kernels.
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Fri Oct 3 03:50:29 2003 UTC (8 years, 4 months ago) by marcel
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Diff to: previous 1.156: preferred, colored
Changes since revision 1.156: +5 -11 lines
Swap the syscall caller frame info (i.e. the return pointer and frame marker) and the syscall stub frame info in the trap frame. Previously we stored the stub frame info in (rp,pfs) and the caller frame info in (iip,cfm). This ends up being suboptimal for the following reasons: 1. When we create a new context, such as for an execve(2), we had to set the (rp,pfs) pair for the entry point when using the syscall path out of the kernel but we need to set the (iip,cfm) pair when we take the interrupt way out. This is mostly just an inconsistency from the kernel's point of view, but an ugly irregularity from gdb(1)'s point of view. 2. The getcontext(2) and setcontext(2) syscalls had to swap the (rp,pfs) and (iip,cfm) pairs to make the context compatible with one created purely in userland. Swapping the (rp,pfs) and (iip,cfm) pairs is visible to signal handlers that actually peek at the mcontext_t and to gdb(1). Since this change is made for gdb(1) and we don't care about signal handlers that peek at the mcontext_t because we're still a tier 2 platform, this ABI breakage is academic at this moment in time. Note that there was no real reason to save the caller frame info in (iip,cfm) and the stub frame info in (rp,pfs).
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Sat Sep 20 20:34:58 2003 UTC (8 years, 4 months ago) by marcel
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Diff to: previous 1.155: preferred, colored
Changes since revision 1.155: +5 -1 lines
Fix the last remaining problem encountered by KSE: apparently it is not guaranteed that the RSE writes the NaT collection immediately, sort of atomically, to the backing store when it writes the register immediately prior to the NaT collection point. This means that we cannot assume that the low 9 bits of the backingstore pointer do not point to the NaT collection. This is rather a surprise and I don't know at this time if it's a bug in the Merced or that it's actually a valid condition of the architecture. A quick scan over the sources does not indicate that we depend on the false assumption elsewhere, but it's something to keep in mind. The fix is to write the saved contents of the ar.rnat register to the backingstore prior to entering the loop that copies the dirty registers from the kernel stack to the user stack.
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Fri Sep 19 22:51:26 2003 UTC (8 years, 4 months ago) by marcel
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Diff to: previous 1.154: preferred, colored
Changes since revision 1.154: +12 -4 lines
Fix the most significant KSE breakage caused by not restoring the restart instruction bits in the PSR. As such, we were returning from interrupt to the instruction in the bundle that caused us to enter the kernel, only now we're returning to a completely different bundle. While close here: add two KASSERTs to make sure that we restore sync contexts only when entered the kernel through a syscall and restore an async context only when entered the kernel through an interrupt, trap or fault. While not exactly here, but close enough: use suword64() when we copy the dirty registers from the kernel stack to the user stack. The code was intended to be be replaced shortly after being added, but that was a couple of weeks ago. I might as well avoid that it is a source for panics until it's replaced.
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Tue Sep 9 05:59:09 2003 UTC (8 years, 5 months ago) by marcel
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Diff to: previous 1.153: preferred, colored
Changes since revision 1.153: +3 -3 lines
Introduce IA64_ID_PAGE_{MASK|SHIFT|SIZE} and LOG2_ID_PAGE_SIZE. The
latter is a kernel option for IA64_ID_PAGE_SHIFT, which in turn
determines IA64_ID_PAGE_MASK and IA64_ID_PAGE_SIZE.
The constants are used instead of the literal hardcoding (in its
various forms) of the size of the direct mappings created in region
6 and 7. The default and probably only workable size is still 256M,
but for kicks we use 128M for LINT.
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Mon Sep 1 07:06:57 2003 UTC (8 years, 5 months ago) by marcel
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Diff to: previous 1.152: preferred, colored
Changes since revision 1.152: +2 -25 lines
Use pmap_steal_memory() for the msgbuf instead of trying to squeeze it in the last chunk (phys_avail block). The last chunk very often is not larger than one or two pages, resulting in a msgbuf that's too small to hold a complete verbose boot. Note that pmap_steal_memory() will bzero the memory it "allocates". Consequently, ia64 will never preserve previous msgbufs. This is not a noticable difference in practice. If the msgbuf could be reused, it was invariably too small to have anything preserved anyway.
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Sat Aug 23 00:07:52 2003 UTC (8 years, 5 months ago) by marcel
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Diff to: previous 1.151: preferred, colored
Changes since revision 1.151: +0 -1 lines
Remove unused inclusion of opt_acpi.h
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Tue Aug 12 08:10:16 2003 UTC (8 years, 6 months ago) by marcel
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Diff to: previous 1.150: preferred, colored
Changes since revision 1.150: +36 -17 lines
Extend identifycpu(): o Differentiate between CPU family and CPU model. There are multiple Itanium 2 models and it's nice to differentiate between them. o Seperately export the CPU family and CPU model with sysctl. o Merced is the only model in the Itanium family. o Add Madison to the Itanium 2 family. We already knew about McKinley. o Print the CPU family between parenthesis, like we do with the i386 CPU class. My prototype now identifies itself as: CPU: Merced (800.03-Mhz Itanium) pluto1 and pluto2 will eventually identify themselves as: CPU: McKinley (900.00-Mhz Itanium 2)
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Sun Aug 10 21:33:07 2003 UTC (8 years, 6 months ago) by marcel
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Diff to: previous 1.149: preferred, colored
Changes since revision 1.149: +68 -69 lines
o move cpu_reset() from vm_machdep.c to machdep.c. o reorder cpu_boot(), cpu_halt() and identifycpu(). No functional change.
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Sun Aug 10 08:04:21 2003 UTC (8 years, 6 months ago) by marcel
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Diff to: previous 1.148: preferred, colored
Changes since revision 1.148: +30 -45 lines
Now that we can ignore up to 8KB of dirty registers, remove the RSE magic from exec_setregs(). In set_mcontext() we now also don't have to worry that we entered the kernel with more that 512 bytes of dirty registers on the kernel stack. Note that we cannot make any assumptions anymore WRT to NaT collection points in exec_setregs(), so we have to deal with them now.
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Thu Aug 7 07:52:39 2003 UTC (8 years, 6 months ago) by marcel
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Diff to: previous 1.147: preferred, colored
Changes since revision 1.147: +69 -33 lines
Better define the flags in the mcontext_t and properly set the flags when we create contexts. The meaning of the flags are documented in <machine/ucontext.h>. I only list them here to help browsing the commit logs: _MC_FLAGS_ASYNC_CONTEXT _MC_FLAGS_HIGHFP_VALID _MC_FLAGS_KSE_SET_MBOX _MC_FLAGS_RETURN_VALID _MC_FLAGS_SCRATCH_VALID Yes, _MC_FLAGS_KSE_SET_MBOX is a hack and I'm proud of it :-)
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Tue Aug 5 18:52:02 2003 UTC (8 years, 6 months ago) by marcel
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Diff to: previous 1.146: preferred, colored
Changes since revision 1.146: +50 -6 lines
o Put the syscall return registers in the context. Not only do we need this for swapcontext(), KSE upcalls initiated from ast() also need to save them so that we properly return the syscall results after having had a context switch. Note that we don't use r11 in the kernel. However, the runtime specification has defined r8-r11 as return registers, so we put r11 in the context as well. I think deischen@ was trying to tell me that we should save the return registers before. I just wasn't ready for it :-) o The EPC syscall code has 2 return registers and 2 frame markers to save. The first (rp/pfs) belongs to the syscall stub itself. The second (iip/cfm) belongs to the caller of the syscall stub. We want to put the second in the context (note that iip and cfm relate to interrupts. They are only being misused by the syscall code, but are not part of a regular context). This way, when the context is switched to again, we return to the caller of setcontext(2) as one would expect. o Deal with dirty registers on the kernel stack. The getcontext() syscall will flush the RSE, so we don't expect any dirty registers in that case. However, in thread_userret() we also need to save the context in certain cases. When that happens, we are sure that there are dirty registers on the kernel stack. This implementation simply copies the registers, one at a time, from the kernel stack to the user stack. NAT collections are not dealt with. Hence we don't preserve NaT bits. A better solution needs to be found at some later time. We also don't deal with this in all cases in set_mcontext. No temporay solution is implemented because it's not a showstopper. The problem is that we need to ignore the dirty registers and we automaticly do that for at most 62 registers. When there are more than 62 dirty registers we have a memory "leak". This commit is fundamental for KSE support.
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Mon Aug 4 05:13:17 2003 UTC (8 years, 6 months ago) by marcel
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Diff to: previous 1.145: preferred, colored
Changes since revision 1.145: +6 -20 lines
Cleanup the clock code. This includes: o Remove alpha specific timer code (mc146818A) and compiled-out calibration of said timer. o Remove i386 inherited timer code (i8253) and related acquire and release functions. o Move sysbeep() from clock.c to machdep.c and have it return ENODEV. Console beeps should be implemented using ACPI or if no such device is described, using the sound driver. o Move the sysctls related to adjkerntz, disable_rtc_set and wall_cmos_clock from machdep.c to clock.c, where the variables are. o Don't hardcode a hz value of 1024 in cpu_initclocks() and don't bother faking a stathz that's 1/8 of that. Keep it simple: hz defaults to HZ and stathz equals hz. This is also how it's done for sparc64. o Keep a per-CPU ITC counter (pc_clock) and adjustment (pc_clockadj) to calculate ITC skew and corrections. On average, we adjust the ITC match register once every ~1500 interrupts for a duration of 2 consequtive interruprs. This is to correct the non-deterministic behaviour of the ITC interrupt (there's a delay between the match and the raising of the interrupt). o Add 4 debugging sysctls to monitor clock behaviour. Those are debug.clock_adjust_edges, debug.clock_adjust_excess, debug.clock_adjust_lost and debug.clock_adjust_ticks. The first counts the individual adjustment cycles (when the skew first crosses the threshold), the second counts the number of times the adjustment was excessive (any non-zero value is to be considered a bug), the third counts lost clock interrupts and the last counts the number of interrupts for which we applied an adjustment (debug.clock_adjust_ticks / debug.clock_adjust_edges gives the avarage duration of an individual adjustment -- should be ~2). While here, remove some nearby (trivial) left-overs from alpha and other cleanups.
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Fri Aug 1 07:21:34 2003 UTC (8 years, 6 months ago) by marcel
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Diff to: previous 1.144: preferred, colored
Changes since revision 1.144: +4 -4 lines
Write the preserved registers to (and read them from) struct reg and struct fpreg.
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Thu Jul 31 01:29:09 2003 UTC (8 years, 6 months ago) by peter
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Diff to: previous 1.143: preferred, colored
Changes since revision 1.143: +2 -1 lines
Cosmetic: fix some disorder of #include "opt_...." files
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Fri Jul 25 05:37:13 2003 UTC (8 years, 6 months ago) by marcel
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Diff to: previous 1.142: preferred, colored
Changes since revision 1.142: +0 -6 lines
Move ia64_pa_access() from machdep.c to mem.c and declare it static. It's only used in mem.c and cannot accidentally be used elsewhere this way.
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Tue Jul 15 04:43:33 2003 UTC (8 years, 6 months ago) by marcel
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Diff to: previous 1.141: preferred, colored
Changes since revision 1.141: +1 -1 lines
Rename thread_siginfo to cpu_thread_siginfo.
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Sat Jun 28 06:34:07 2003 UTC (8 years, 7 months ago) by davidxu
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Diff to: previous 1.140: preferred, colored
Changes since revision 1.140: +19 -0 lines
Add a machine depended function thread_siginfo, SA signal code will use the function to construct a siginfo structure and use the result to export to userland. Reviewed by: julian
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Thu Jun 12 00:15:18 2003 UTC (8 years, 8 months ago) by marcel
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Diff to: previous 1.139: preferred, colored
Changes since revision 1.139: +10 -2 lines
Make sure pcpu->pc_pcb is pointing to a 16-byte aligned address. The PCB contains FP registers, whose alignment must be 16 bytes at least. Since the PCB pointed to by pc_pcb is immediately after the PCPU itself, round-up the size of thge PCPU to a multiple of 16 bytes. The PCPU is page aligned. This fixes a misalignment trap caused by stopping a CPU in a SMP kernel, such as been done when entering the debugger. Reported by: Alan Robinson <alan.robinson@fujitsu-siemens.com>
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Sun Jun 1 23:22:56 2003 UTC (8 years, 8 months ago) by marcel
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Diff to: previous 1.138: preferred, colored
Changes since revision 1.138: +5 -0 lines
Improve set_mcontext: o Don't copy psr verbatim from the user supplied context. Only allow userland to change the processor settings that are part of the user mask.
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Sat May 31 21:07:08 2003 UTC (8 years, 8 months ago) by marcel
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Diff to: previous 1.137: preferred, colored
Changes since revision 1.137: +14 -4 lines
Implement set_mcontext() and get_mcontext(). Just as for sendsig() and sigreturn(), we cheat and assume the preserved registers are still on-chip and unmodified. This is actually the case, but more by accident than by design. We need to use unwinding eventually or explicitly compile the kernel in a way that the compiler steers clear from using the preserved registers completely.
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Sat May 31 20:42:35 2003 UTC (8 years, 8 months ago) by marcel
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Diff to: previous 1.136: preferred, colored
Changes since revision 1.136: +12 -2 lines
Make sure we have all the dirty registers in user frames on the backing store before we discard them. It is possible that we enter the kernel (due to an execve in this case) with a lot of dirty user registers and that the RSE has only partially spilled them (to make room for new frames). We cannot move the backing store pointer down (to discard user registers) when not all of the user registers are on the backing store. So, we flush the register stack IFF this happens. Unconditionally doing the flush is too costly, because the condition in which we need to flush is very rare. This change appears to fix the SIGSEGV that sometimes happen for newly executed processes and so far also appears to fix the last of the corruption. It is possible, although not likely, that this change prevents some other bug from happening, even though it is itself not a fix. Hence the uncertainty. We'll know in a couple of months I guess :-)
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Thu May 29 06:30:36 2003 UTC (8 years, 8 months ago) by marcel
Branches: MAIN
CVS tags: RELENG_5_1_BP, RELENG_5_1_0_RELEASE, RELENG_5_1
Diff to: previous 1.135: preferred, colored
Changes since revision 1.135: +0 -13 lines
Move the sysctls of the misalignment handler to where they belong and use OID_AUTO instead of fixed IDs. Approved by: re@ (blanket)
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Tue May 27 01:00:12 2003 UTC (8 years, 8 months ago) by marcel
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Diff to: previous 1.134: preferred, colored
Changes since revision 1.134: +0 -6 lines
Fix fu{byte|word*} and su{byte|word*}:
o If the address was not within user space we jumped to fusufault
where we would clear pcb_onfault and return 0. There are two
bugs here:
1. We never got to the point where we assigned the address of
pcb_onfault to r15, which means that we would clobber some
random memory location, including I/O space or ROM.
2. We're supposed to return -1 on error.
o Make sure we have proper memory ordering for setting pcb_onfault,
doing the memory access to user space and clearing pcb_onfault.
For the fu* family of functions this means that we need a mf
instruction, because we don't have acquire semantics on stores
and release semantics on loads (hence st;ld cannot be ordered
without intermediate mf).
While here, implement casuptr() so that we are a (small) step
closer to supporting libthr and deobfuscate the non-implementation
of {f|s}uswintr.
Approved by: re@ (blanket)
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Sat May 24 00:17:33 2003 UTC (8 years, 8 months ago) by marcel
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Diff to: previous 1.133: preferred, colored
Changes since revision 1.133: +17 -1 lines
Fix an alpha inheritance bug: On alpha, PAL is involved in context management and after wiring the CPU (in alpha_init()) a context switch was performed to tell PAL about the context. This was bogusly brought over to ia64 where it introduced bugs, because we restored the context from a mostly uninitialized PCB. The cleanup constitutes: o Remove the unused arguments from ia64_init(). o Don't return from ia64_init(), but instead call mi_startup() directly. This reduces the amount of muckery in assembly and also allows for the next bullet: o Save our currect context prior to calling mi_startup(). The reason for this is that many threads are created from thread0 by cloning the PCB. By saving our context in the PCB, we have something sane to clone. It also ensures that a cloned thread that does not alter the context in any way will return to the saved context, where we're ready for the eventuality with a nice, user unfriendly panic(). The cleanup fixes at least the following bugs: o Entering mi_startup() with the RSE in enforced lazy mode. o Re-execution of ia64_init() in certain "lab" conditions. While here, add proper unwind directives to __start() so that the unwind knows it has reached the bottom of the (call) stack. Approved by: re@ (blanket)
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Mon May 19 04:16:30 2003 UTC (8 years, 8 months ago) by marcel
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Diff to: previous 1.132: preferred, colored
Changes since revision 1.132: +6 -3 lines
pmap_install() needs to be atomic WRT to context switching. Protect switching user regions (region 0-4) with schedlock. Avoid unnecessary recursion on schedlock by moving the core functionality to another function (pmap_switch()) where we assert schedlock is held. Turn pmap_install() into a wrapper that grabs schedlock. This minimizes the number of callsites that need to be changed. Since we already have schedlock in cpu_switch() and cpu_throw(), have them call pmap_switch() directly. These were also the only two calls to pmap_install() outside pmap.c, so make pmap_install() static and remove its prototype from pmap.h Approved by: re (blanket)
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Fri May 16 21:26:40 2003 UTC (8 years, 8 months ago) by marcel
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Diff to: previous 1.131: preferred, colored
Changes since revision 1.131: +368 -466 lines
Revamp of the syscall path, exception and context handling. The prime objectives are: o Implement a syscall path based on the epc inststruction (see sys/ia64/ia64/syscall.s). o Revisit the places were we need to save and restore registers and define those contexts in terms of the register sets (see sys/ia64/include/_regset.h). Secundairy objectives: o Remove the requirement to use contigmalloc for kernel stacks. o Better handling of the high FP registers for SMP systems. o Switch to the new cpu_switch() and cpu_throw() semantics. o Add a good unwinder to reconstruct contexts for the rare cases we need to (see sys/contrib/ia64/libuwx) Many files are affected by this change. Functionally it boils down to: o The EPC syscall doesn't preserve registers it does not need to preserve and places the arguments differently on the stack. This affects libc and truss. o The address of the kernel page directory (kptdir) had to be unstaticized for use by the nested TLB fault handler. The name has been changed to ia64_kptdir to avoid conflicts. The renaming affects libkvm. o The trapframe only contains the special registers and the scratch registers. For syscalls using the EPC syscall path no scratch registers are saved. This affects all places where the trapframe is accessed. Most notably the unaligned access handler, the signal delivery code and the debugger. o Context switching only partly saves the special registers and the preserved registers. This affects cpu_switch() and triggered the move to the new semantics, which additionally affects cpu_throw(). o The high FP registers are either in the PCB or on some CPU. context switching for them is done lazily. This affects trap(). o The mcontext has room for all registers, but not all of them have to be defined in all cases. This mostly affects signal delivery code now. The *context syscalls are as of yet still unimplemented. Many details went into the removal of the requirement to use contigmalloc for kernel stacks. The details are mostly CPU specific and limited to exception_save() and exception_restore(). The few places where we create, destroy or switch stacks were mostly simplified by not having to construct physical addresses and additionally saving the virtual addresses for later use. Besides more efficient context saving and restoring, which of course yields a noticable speedup, this also fixes the dreaded SMP bootup problem as a side-effect. The details of which are still not fully understood. This change includes all the necessary backward compatibility code to have it handle older userland binaries that use the break instruction for syscalls. Support for break-based syscalls has been pessimized in favor of a clean implementation. Due to the overall better performance of the kernel, this will still be notived as an improvement if it's noticed at all. Approved by: re@ (jhb)
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Tue May 13 20:35:58 2003 UTC (8 years, 9 months ago) by jhb
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Diff to: previous 1.130: preferred, colored
Changes since revision 1.130: +4 -1 lines
- Merge struct procsig with struct sigacts. - Move struct sigacts out of the u-area and malloc() it using the M_SUBPROC malloc bucket. - Add a small sigacts_*() API for managing sigacts structures: sigacts_alloc(), sigacts_free(), sigacts_copy(), sigacts_share(), and sigacts_shared(). - Remove the p_sigignore, p_sigacts, and p_sigcatch macros. - Add a mutex to struct sigacts that protects all the members of the struct. - Add sigacts locking. - Remove Giant from nosys(), kill(), killpg(), and kern_sigaction() now that sigacts is locked. - Several in-kernel functions such as psignal(), tdsignal(), trapsignal(), and thread_stopped() are now MP safe. Reviewed by: arch@ Approved by: re (rwatson)
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Fri May 2 20:34:15 2003 UTC (8 years, 9 months ago) by marcel
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Diff to: previous 1.129: preferred, colored
Changes since revision 1.129: +0 -3 lines
Option KADB does not exist. It came from alpha, where it still exists.
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Fri Apr 25 01:50:29 2003 UTC (8 years, 9 months ago) by deischen
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Diff to: previous 1.128: preferred, colored
Changes since revision 1.128: +1 -1 lines
Add an argument to get_mcontext() which specified whether the syscall return values should be cleared. The system calls getcontext() and swapcontext() want to return 0 on success but these contexts can be switched to at a later time so the return values need to be cleared in the saved register sets. Other callers of get_mcontext() would normally want the context without clearing the return values. Remove the i386-specific context saving from the KSE code. get_mcontext() is not i386-specific any more. Fix a bad pointer in the alpha get_mcontext() code. The context was being bcopy()'d from &td->tf_frame, but tf_frame is itself a pointer, so the thread was being copied instead. Spotted by jake. Glanced at by: jake Reviewed by: bde (months ago)
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Tue Apr 1 00:18:55 2003 UTC (8 years, 10 months ago) by jeff
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Diff to: previous 1.127: preferred, colored
Changes since revision 1.127: +7 -0 lines
- Define a new md function 'casuptr'. This atomically compares and sets a pointer that is in user space. It will be used as the basic primitive for a kernel supported user space lock implementation. - Implement this function in x86's support.s - Provide stubs that return -1 in all other architectures. Implementations will follow along shortly. Reviewed by: jake
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Mon Mar 31 22:49:15 2003 UTC (8 years, 10 months ago) by jeff
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Diff to: previous 1.126: preferred, colored
Changes since revision 1.126: +3 -3 lines
- Move p->p_sigmask to td->td_sigmask. Signal masks will be per thread with a follow on commit to kern_sig.c - signotify() now operates on a thread since unmasked pending signals are stored in the thread. - PS_NEEDSIGCHK moves to TDF_NEEDSIGCHK.
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Mon Mar 31 21:40:47 2003 UTC (8 years, 10 months ago) by jeff
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Diff to: previous 1.125: preferred, colored
Changes since revision 1.125: +1 -5 lines
- Use sigexit() instead of twiddling the signal mask, catch, ignore, and action bits to allow SIGILL to work as expected. This brings this file in line with other architectures.
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Mon Feb 17 08:17:26 2003 UTC (8 years, 11 months ago) by marcel
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Diff to: previous 1.124: preferred, colored
Changes since revision 1.124: +4 -2 lines
Print two new processor features: o Spontaneous deferral (A feature required by dutch railways :-) o 16-byte atomic operations (ld, st, cmpxchg)
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Sat Feb 1 22:50:09 2003 UTC (9 years ago) by marcel
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Diff to: previous 1.123: preferred, colored
Changes since revision 1.123: +7 -60 lines
Remove special casing for running in the simulator from the kernel and instead add platform, firmware and EFI stubs to the loader. The net effect of this change is that besides a special console and disk driver, the kernel has no knowledge of the simulator. This has the following advantages: o Simulator support is much harder to break, o It's easier to make use of more feature complete simulators. This would only need a change in the simulator specific loader, o Running SMP kernels within the simulator. Note that ski at this time does not simulate IPIs, so there's no way to start APs. The platform, firmware and EFI stubs describe the following hardware: o 4 CPU Itanium, o 128 MB RAM within the 4GB address space, o 64 MB RAM above the 4GB address space. NOTE: The stubs in the skiloader describe a machine that should in parts be defined by the simulator. Things like processor interrupt block and AP wakeup vector cannot be choosen at random because they require interpretation by the simulator. Currently the simulator is ignorant of this. This change introduces an unofficial SSC call SSC_SAL_SET_VECTORS which is ignored by the simulator. Tested with: ski (version 0.943 for linux)
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Sun Nov 24 20:15:08 2002 UTC (9 years, 2 months ago) by marcel
Branches: MAIN
CVS tags: RELENG_5_0_BP, RELENG_5_0_0_RELEASE, RELENG_5_0
Diff to: previous 1.122: preferred, colored
Changes since revision 1.122: +37 -3 lines
MFp4: Add function map_port_space() to map the memory mapped I/O port range as uncacheable virtual memory and call it prior to probing for a console. This removes the dependency on the loader to have done this for us. Note that this change does not include doing the same for APs. Approved by: re (blanket)
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Sat Nov 16 06:35:52 2002 UTC (9 years, 2 months ago) by deischen
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Diff to: previous 1.121: preferred, colored
Changes since revision 1.121: +14 -0 lines
Add getcontext, setcontext, and swapcontext as system calls. Previously these were libc functions but were requested to be made into system calls for atomicity and to coalesce what might be two entrances into the kernel (signal mask setting and floating point trap) into one. A few style nits and comments from bde are also included. Tested on alpha by: gallatin
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Sat Nov 9 16:19:14 2002 UTC (9 years, 3 months ago) by des
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Diff to: previous 1.120: preferred, colored
Changes since revision 1.120: +4 -3 lines
Print real / avail memory in megabytes rather than kilobytes.
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Thu Nov 7 23:57:16 2002 UTC (9 years, 3 months ago) by tmm
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Diff to: previous 1.119: preferred, colored
Changes since revision 1.119: +0 -27 lines
Move the definitions of the hw.physmem, hw.usermem and hw.availpages sysctls to MI code; this reduces code duplication and makes all of them available on sparc64, and the latter two on powerpc. The semantics by the i386 and pc98 hw.availpages is slightly changed: previously, holes between ranges of available pages would be included, while they are excluded now. The new behaviour should be more correct and brings i386 in line with the other architectures. Move physmem to vm/vm_init.c, where this variable is used in MI code.
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Wed Nov 6 14:53:35 2002 UTC (9 years, 3 months ago) by jmallett
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Diff to: previous 1.118: preferred, colored
Changes since revision 1.118: +0 -2 lines
Remove what was a temporary bogus assignment of bits of siginfo_t, as it does not look like the prerequisites to fill it in properly will be in the tree for the upcoming release, but it's mostly done, so there is no need for these to stay around to remind us.
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Wed Oct 30 05:55:29 2002 UTC (9 years, 3 months ago) by marcel
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Diff to: previous 1.117: preferred, colored
Changes since revision 1.117: +35 -15 lines
Rewrite cpu_switch(). The most notable change is the fact that we now have f16-f31 as part of the context. The PCB has been reorganized to better match how we save and restore the (preserved) registers. This commit also moves the context restoriation to its own function (named pcb_restore), as we did with pcb_save. Only minimal effort has been put in writing optimal assembly. The expectation is that there will be more rounds of changes.
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Fri Oct 25 19:10:56 2002 UTC (9 years, 3 months ago) by peter
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Diff to: previous 1.116: preferred, colored
Changes since revision 1.116: +9 -12 lines
Split 4.x and 5.x signal handling so that we can keep 4.x signal handling clean and functional as 5.x evolves. This allows some of the nasty bandaids in the 5.x codepaths to be unwound. Encapsulate 4.x signal handling under COMPAT_FREEBSD4 (there is an anti-foot-shooting measure in place, 5.x folks need this for a while) and finish encapsulating the older stuff under COMPAT_43. Since the ancient stuff is required on alpha (longjmp(3) passes a 'struct osigcontext *' to the current sigreturn(2), instead of the 'ucontext_t *' that sigreturn is supposed to take), add a compile time check to prevent foot shooting there too. Add uniform COMPAT_43 stubs for ia64/sparc64/powerpc. Tested on: i386, alpha, ia64. Compiled on sparc64 (a few days ago). Approved by: re
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Thu Oct 24 19:17:06 2002 UTC (9 years, 3 months ago) by jhb
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Diff to: previous 1.115: preferred, colored
Changes since revision 1.115: +5 -5 lines
Oops, I missed a few changes in 'device acpica' -> 'device acpi' change. Submitted by: Hiten Pandya <hiten@angelica.unixdaemons.com>
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Sat Oct 19 19:30:38 2002 UTC (9 years, 3 months ago) by marcel
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Diff to: previous 1.114: preferred, colored
Changes since revision 1.114: +0 -14 lines
Update the unwind information when modules are loaded and unloaded
by using the linker hooks. Since these hooks are called for the
kernel as well, we don't need to deal with that with a special
SYSINIT. The initialization implicitly performed on the first
update of the unwind information is made explicit with a SYSINIT.
We now don't need the _ia64_unwind_{start|end} symbols.
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Sat Oct 19 04:14:08 2002 UTC (9 years, 3 months ago) by marcel
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Diff to: previous 1.113: preferred, colored
Changes since revision 1.113: +6 -1 lines
Make this compile when DDB is not defined by conditionally compiling all references to ksym_start and ksym_end.
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Fri Oct 4 01:00:35 2002 UTC (9 years, 4 months ago) by peter
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Diff to: previous 1.112: preferred, colored
Changes since revision 1.112: +1 -0 lines
Do a bit of rude hackery to get clock interrupts on all CPUs. This is partly based on the Alpha system which duplicates the clock to each cpu, instead of doing a clock roundrobin like on i386. This means we get hz * ncpu clocks per second and so we have to seperate clock sampling from actual 'do the work' clock processing. The BSP runs the complete processing, the rest just sample state etc. Using the on-cpu interval timer is not ideal as it will drift. There is more to be done here, we should use an external clock source.
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Fri Sep 20 17:50:58 2002 UTC (9 years, 4 months ago) by phk
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Diff to: previous 1.111: preferred, colored
Changes since revision 1.111: +0 -62 lines
For reasons now lost in historical fog, the bounds_check_with_label() function were put in i386/i386/machdep.c from where it has been cut and pasted to other architectures with only minor corruption. Disklabel is really a MI format in many ways, at least it certainly is when you operate on struct disklabel. Put bounds_check_with_label() back in subr_disklabel.c where it belongs. Sponsored by: DARPA & NAI Labs.
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Sun Sep 15 23:52:23 2002 UTC (9 years, 4 months ago) by julian
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Diff to: previous 1.110: preferred, colored
Changes since revision 1.110: +1 -1 lines
Allocate KSEs and KSEGRPs separatly and remove them from the proc structure. next step is to allow > 1 to be allocated per process. This would give multi-processor threads. (when the rest of the infrastructure is in place) While doing this I noticed libkvm and sys/kern/kern_proc.c:fill_kinfo_proc are diverging more than they should.. corrective action needed soon.
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Sat Sep 7 19:12:45 2002 UTC (9 years, 5 months ago) by jmallett
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Diff to: previous 1.109: preferred, colored
Changes since revision 1.109: +2 -0 lines
Fill out two fields (si_pid, si_uid) in the siginfo structure handed back to userland in the signal handler that were not being iflled out before, but should and can be. This part of sendsig could be slightly refactored to use an MI interface, or ideally, *sendsig*() would have an API change to accept a siginfo_t, which would be filled out by an MI function in the level above sendsig, and said MI function would make a small call into MD code to fill out the MD parts (some of which may be bogus, such as the si_addr stuff in some places). This would eventually make it possible for parts of the kernel sending signals to set up a siginfo with meaningful information. Reviewed by: mux MFC after: 2 weeks
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Sat Aug 31 03:33:31 2002 UTC (9 years, 5 months ago) by peter
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Diff to: previous 1.108: preferred, colored
Changes since revision 1.108: +7 -11 lines
Take a shot at fixing up a whole stack of style and other embarresing unforced errors that Bruce identified. I have not yet addressed all of his concerns.
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Fri Aug 30 04:04:35 2002 UTC (9 years, 5 months ago) by peter
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Diff to: previous 1.107: preferred, colored
Changes since revision 1.107: +17 -10 lines
Change hw.physmem and hw.usermem to unsigned long like they used to be in the original hardwired sysctl implementation. The buf size calculator still overflows an integer on machines with large KVA (eg: ia64) where the number of pages does not fit into an int. Use 'long' there. Change Maxmem and physmem and related variables to 'long', mostly for completeness. Machines are not likely to overflow 'int' pages in the near term, but then again, 640K ought to be enough for anybody. This comes for free on 32 bit machines, so why not?
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Thu Aug 29 06:17:47 2002 UTC (9 years, 5 months ago) by jake
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Diff to: previous 1.106: preferred, colored
Changes since revision 1.106: +2 -1 lines
Renamed poorly named setregs to exec_setregs. Moved its prototype to imgact.h with the other exec support functions.
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Sat Aug 3 03:35:06 2002 UTC (9 years, 6 months ago) by peter
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Diff to: previous 1.105: preferred, colored
Changes since revision 1.105: +15 -0 lines
Ignore memory above 4GB for now due to unpleasant pci issues.
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Wed May 29 05:19:07 2002 UTC (9 years, 8 months ago) by marcel
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Diff to: previous 1.104: preferred, colored
Changes since revision 1.104: +1 -0 lines
Remove the definition of struct mca_guid and use the generic struct uuid defined in <sys/uuid.h>. Use uuid/UUID instead of guid/GUID to emphasize that the identifiers are DCE version 1 identifiers and also to avoid inconsistencies as much a possible.
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Mon May 20 05:41:20 2002 UTC (9 years, 8 months ago) by marcel
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Diff to: previous 1.103: preferred, colored
Changes since revision 1.103: +95 -14 lines
Flesh-out ptrace support. This obviously needs more work.
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Sun May 19 04:42:19 2002 UTC (9 years, 8 months ago) by marcel
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Diff to: previous 1.102: preferred, colored
Changes since revision 1.102: +1 -0 lines
o Remove namespace pollution from param.h:
- Don't include ia64_cpu.h and cpu.h
- Guard definitions by _NO_NAMESPACE_POLLUTION
- Move definition of KERNBASE to vmparam.h
o Move definitions of IA64_RR_{BASE|MASK} to vmparam.h
o Move definitions of IA64_PHYS_TO_RR{6|7} to vmparam.h
o While here, remove some left-over Alpha references.
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Thu May 2 05:30:42 2002 UTC (9 years, 9 months ago) by marcel
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Diff to: previous 1.101: preferred, colored
Changes since revision 1.101: +0 -1 lines
PCPU(current_pmap) is initialized in pmap_bootstrap. No need to do it again.
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Wed May 1 06:52:08 2002 UTC (9 years, 9 months ago) by peter
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Diff to: previous 1.100: preferred, colored
Changes since revision 1.100: +14 -7 lines
Connect up kern_envp *before* we use it for getenv() and console probing. It is a bit late after that when we have no consoles. :-] Also, fix a comment nit and print a warning about missing metadata.
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Tue Apr 30 02:29:00 2002 UTC (9 years, 9 months ago) by marcel
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Diff to: previous 1.99: preferred, colored
Changes since revision 1.99: +10 -11 lines
Make this work for ski again. Don't call ia64_mca_init() when we're in the simulator.
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Fri Apr 26 19:36:25 2002 UTC (9 years, 9 months ago) by marcel
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Diff to: previous 1.98: preferred, colored
Changes since revision 1.98: +3 -0 lines
Initialize MCA in cpu_startup() so that it's ready before we wake-up the application processors. This allows us to collect unconsumed AP specific error records as part of the wake-up.
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Thu Apr 25 17:51:43 2002 UTC (9 years, 9 months ago) by marcel
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Diff to: previous 1.97: preferred, colored
Changes since revision 1.97: +1 -1 lines
The official name for McKinley is: Itanium 2
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Fri Apr 19 06:35:55 2002 UTC (9 years, 9 months ago) by marcel
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Diff to: previous 1.96: preferred, colored
Changes since revision 1.96: +4 -29 lines
Remove the bootinfo kludge. We get the address of the bootinfo block from the loader.
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Wed Apr 17 13:06:35 2002 UTC (9 years, 9 months ago) by mux
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Changes since revision 1.95: +4 -1 lines
Rework the kernel environment subsystem. We now convert the static environment needed at boot time to a dynamic subsystem when VM is up. The dynamic kernel environment is protected by an sx lock. This adds some new functions to manipulate the kernel environment : freeenv(), setenv(), unsetenv() and testenv(). freeenv() has to be called after every getenv() when you have finished using the string. testenv() only tests if an environment variable is present, and doesn't require a freeenv() call. setenv() and unsetenv() are self explanatory. The kenv(2) syscall exports these new functionalities to userland, mainly for kenv(1). Reviewed by: peter
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Sun Apr 14 04:33:41 2002 UTC (9 years, 9 months ago) by peter
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Diff to: previous 1.94: preferred, colored
Changes since revision 1.94: +14 -2 lines
Allow a kernel to be compiled with both SKI and acpica and still work on real hardware. (SKI used to break the sapic probes)
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Sat Apr 13 23:37:10 2002 UTC (9 years, 9 months ago) by alc
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Changes since revision 1.93: +2 -0 lines
Add comment that sigreturn() is MPSAFE.
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Fri Apr 12 07:43:35 2002 UTC (9 years, 10 months ago) by dfr
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Changes since revision 1.92: +7 -0 lines
Initialise ar.cflg, which contains the IA-32 registers cr0 and cr4. Since all IA-32 processes use the same values for cr0 and cr4, we initialise them at system startup.
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Fri Apr 12 05:17:15 2002 UTC (9 years, 10 months ago) by peter
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Diff to: previous 1.91: preferred, colored
Changes since revision 1.91: +1 -1 lines
Really fix uniprocessor on IA64. Note to self: do not use variables before they are initialized. I had correctly figured out that the UP problem was the pcpu current_pmap thing, but didn't fix it right last time.
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Tue Apr 9 11:18:40 2002 UTC (9 years, 10 months ago) by phk
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Changes since revision 1.90: +0 -12 lines
GC various bits and pieces of USERCONFIG from all over the place.
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Thu Apr 4 17:49:46 2002 UTC (9 years, 10 months ago) by bde
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Diff to: previous 1.89: preferred, colored
Changes since revision 1.89: +1 -0 lines
Moved signal handling and rescheduling from userret() to ast() so that they aren't in the usual path of execution for syscalls and traps. The main complication for this is that we have to set flags to control ast() everywhere that changes the signal mask. Avoid locking in userret() in most of the remaining cases. Submitted by: luoqi (first part only, long ago, reorganized by me) Reminded by: dillon
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Thu Apr 4 06:59:18 2002 UTC (9 years, 10 months ago) by alc
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Diff to: previous 1.88: preferred, colored
Changes since revision 1.88: +16 -18 lines
o Kill the MD grow_stack(). Call the MI vm_map_growstack() in its place. o Eliminate the use of useracc() and grow_stack() from sendsig(). Reviewed by: peter
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Wed Apr 3 05:16:09 2002 UTC (9 years, 10 months ago) by marcel
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Diff to: previous 1.87: preferred, colored
Changes since revision 1.87: +2 -4 lines
o GC dumplo o Replace the string lit. "ia64" with MACHINE
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Tue Apr 2 22:19:14 2002 UTC (9 years, 10 months ago) by jhb
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Diff to: previous 1.86: preferred, colored
Changes since revision 1.86: +5 -18 lines
- Move the MI mutexes sched_lock and Giant from being declared in the various machdep.c's to being declared in kern_mutex.c. - Add a new function mutex_init() used to perform early initialization needed for mutexes such as setting up thread0's contested lock list and initializing MI mutexes. Change the various MD startup routines to call this function instead of duplicating all the code themselves. Tested on: alpha, i386
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Tue Apr 2 07:20:42 2002 UTC (9 years, 10 months ago) by marcel
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Diff to: previous 1.85: preferred, colored
Changes since revision 1.85: +5 -11 lines
o GC totalphysmem and resvmem. o Rephrase comment describing that the memory region can contain the kernel.
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Sat Mar 30 23:25:22 2002 UTC (9 years, 10 months ago) by marcel
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Diff to: previous 1.84: preferred, colored
Changes since revision 1.84: +31 -4 lines
Transition to a model where the loader passes the address of the bootinfo block in register r8. In locore.s we save the address in the global variable 'pa_bootinfo'. In machdep.c we compare this value against the hardwired address, but don't depend on its validity yet (ie: we still expect the bootinfo block to be at the hardwired address). After a small amount of time, we'll flip the switch and depend on the loader to pass us the address. From that moment on the loader is free to put it anywhere it likes, provided the machine itself likes it as well. Add some verbosity to aid in the transition. We emit a message if the loader didn't pass the address and we also emit a message if there's no bootinfo block at the hardwired address. While in locore.s, reduce the number of redundant serialization instructions. A srlz.i is a proper superset of a srlz.d and thus is a valid replacement. Also slightly reorder the movl instructions to improve bundle density.
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Wed Mar 27 09:23:37 2002 UTC (9 years, 10 months ago) by jeff
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Changes since revision 1.83: +1 -1 lines
Add a new mtx_init option "MTX_DUPOK" which allows duplicate acquires of locks with this flag. Remove the dup_list and dup_ok code from subr_witness. Now we just check for the flag instead of doing string compares. Also, switch the process lock, process group lock, and uma per cpu locks over to this interface. The original mechanism did not work well for uma because per cpu lock names are unique to each zone. Approved by: jhb
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Thu Mar 21 07:41:02 2002 UTC (9 years, 10 months ago) by peter
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Diff to: previous 1.82: preferred, colored
Changes since revision 1.82: +1 -0 lines
In UP mode, the primary cpu's per-cpu current_pmap was not initialized - this was only done as a side effect of calling cpu_mp_start(). I haven't actually tested that this fixes UP kernels, but it feels about right.
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Wed Mar 20 23:30:30 2002 UTC (9 years, 10 months ago) by alfred
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Changes since revision 1.81: +2 -2 lines
Remove __P. Reviewd by: peter
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Tue Mar 19 11:18:47 2002 UTC (9 years, 10 months ago) by peter
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Diff to: previous 1.80: preferred, colored
Changes since revision 1.80: +1 -1 lines
My ia64 box for some reason likes to fragment the beginning/end of memory a bit before handing it over to the OS. I occasionally have 11 segments with several 8K or so fragments depending on nvram settings and what I have done under loader(8) before booting. This needs to be revisited.
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Tue Mar 19 11:14:51 2002 UTC (9 years, 10 months ago) by peter
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Diff to: previous 1.79: preferred, colored
Changes since revision 1.79: +0 -3 lines
Move a couple of prototypes together instead of being incompletely scattered around.
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Thu Mar 14 09:20:07 2002 UTC (9 years, 11 months ago) by dfr
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Diff to: previous 1.78: preferred, colored
Changes since revision 1.78: +9 -6 lines
Move the call to pmap_bootstrap to after the initialisation of thread0. This allows us to use mutexes in pmap safely. Also initialise fpcurthread for cpu0 so that ia64_fpstate_check doesn't barf during boot.
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Tue Mar 12 00:18:20 2002 UTC (9 years, 11 months ago) by peter
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Diff to: previous 1.77: preferred, colored
Changes since revision 1.77: +2 -1 lines
Fix a warning (make ucontext_t *ucp a const)
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Tue Mar 12 00:17:45 2002 UTC (9 years, 11 months ago) by peter
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Diff to: previous 1.76: preferred, colored
Changes since revision 1.76: +2 -2 lines
Stop concatenating __func__ with strings
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Sun Mar 3 19:23:15 2002 UTC (9 years, 11 months ago) by dfr
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Diff to: previous 1.75: preferred, colored
Changes since revision 1.75: +15 -12 lines
* Include <sys/ucontext.h> so that this compiles again. * Move the section which manipulates ia64_pal_base to after cninit() so that we don't risk printing anything before we have a console. * Don't call ia64_probe_sapics() for a SKI build. This should really be dependant on ACPICA being present or something.
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Thu Feb 7 20:58:44 2002 UTC (10 years ago) by julian
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Diff to: previous 1.74: preferred, colored
Changes since revision 1.74: +9 -10 lines
Pre-KSE/M3 commit. this is a low-functionality change that changes the kernel to access the main thread of a process via the linked list of threads rather than assuming that it is embedded in the process. It IS still embeded there but remove all teh code that assumes that in preparation for the next commit which will actually move it out. Reviewed by: peter@freebsd.org, gallatin@cs.duke.edu, benno rice,
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Fri Feb 1 15:44:02 2002 UTC (10 years ago) by bde
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Diff to: previous 1.73: preferred, colored
Changes since revision 1.73: +6 -15 lines
Compile osigreturn() unconditionally since it will always be needed on some arches and the syscall table is machine-independent. It was (bogusly) conditional on COMPAT_43, so this usually makes no difference. ia64: in addition: - replace the bogus cloned comment before osigreturn() by a correct one. osigreturn() is just a stub fo ia64's. - fix the formatting of cloned comment before sigreturn(). - fix the return code. use nosys() instead of returning ENOSYS to get the same semantics as if the syscall is not in the syscall table. Generating SIGSYS is actually correct here. - fix style bugs. powerpc: copy the cleaned up ia64 stub. This mainly fixes a bogus comment. sparc64: copy the cleaned up the ia64 stub, since there was no stub before.
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Fri Jan 18 07:49:37 2002 UTC (10 years ago) by marcel
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Diff to: previous 1.72: preferred, colored
Changes since revision 1.72: +1 -1 lines
Remove the definition of bootverbose. This fixes the link failure caused by disabling the emission of common symbols.
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Sun Dec 30 09:49:39 2001 UTC (10 years, 1 month ago) by marcel
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Diff to: previous 1.71: preferred, colored
Changes since revision 1.71: +37 -51 lines
o Reimplement map_pal_code to work with a global variable ia64_pal_base instead of scanning the EFI tables. This way AP startup code can more easily use the function. o Initialize ia64_pal_base in ia64_init(). When the PAL code doesn't need explicit mapping or no PAL code has been found, ia64_pal_base will be 0. o Remove some unused global variables. o Also in ia64_init(), allocate only 1 page for struct pcpu and remove some Alpha leftovers. o Initialize pc_pcb in cpu_pcpu_init().
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Tue Dec 11 23:33:41 2001 UTC (10 years, 2 months ago) by jhb
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Diff to: previous 1.70: preferred, colored
Changes since revision 1.70: +8 -15 lines
Overhaul the per-CPU support a bit: - The MI portions of struct globaldata have been consolidated into a MI struct pcpu. The MD per-CPU data are specified via a macro defined in machine/pcpu.h. A macro was chosen over a struct mdpcpu so that the interface would be cleaner (PCPU_GET(my_md_field) vs. PCPU_GET(md.md_my_md_field)). - All references to globaldata are changed to pcpu instead. In a UP kernel, this data was stored as global variables which is where the original name came from. In an SMP world this data is per-CPU and ideally private to each CPU outside of the context of debuggers. This also included combining machine/globaldata.h and machine/globals.h into machine/pcpu.h. - The pointer to the thread using the FPU on i386 was renamed from npxthread to fpcurthread to be identical with other architectures. - Make the show pcpu ddb command MI with a MD callout to display MD fields. - The globaldata_register() function was renamed to pcpu_init() and now init's MI fields of a struct pcpu in addition to registering it with the internal array and list. - A pcpu_destroy() function was added to remove a struct pcpu from the internal array and list. Tested on: alpha, i386 Reviewed by: peter, jake
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Sun Dec 9 01:57:07 2001 UTC (10 years, 2 months ago) by dillon
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Diff to: previous 1.69: preferred, colored
Changes since revision 1.69: +2 -1 lines
Allow maxusers to be specified as 0 in the kernel config, which will cause the system to auto-size to between 32 and 512 depending on the amount of memory. MFC after: 1 week
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Mon Nov 19 07:25:42 2001 UTC (10 years, 2 months ago) by peter
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Diff to: previous 1.68: preferred, colored
Changes since revision 1.68: +11 -0 lines
Initial cut at calling the EFI-provided FPSWA (Floating Point Software Assist) driver to handle the "messy" floating point cases which cause traps to the kernel for handling.
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Mon Nov 12 07:18:16 2001 UTC (10 years, 3 months ago) by marcel
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Diff to: previous 1.67: preferred, colored
Changes since revision 1.67: +9 -4 lines
o os_boot_rendez is responsible for clearing the IRR bit by reading cr.ivr, as well as writing to cr.eoi. o use global variables to pass information to os_boot_rendez so that it doesn't have to jump through hoops to find it out. This avoids traps on the AP without it even being initialized. This fixes SMP configurations. o Move the probing of the MADT to the end of cpu_startup, instead of at the start of cpu_mp_probe. We need to probe the MADT for non-SMP configurations as well. This fixes uniprocessor configurations. o Serialize AP wake-up by waiting for the AP. We need to do this since we use global variables to for the AP to use. As a side-effect, we can use printf() more easily to see what's going on.
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Mon Nov 12 04:14:04 2001 UTC (10 years, 3 months ago) by peter
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Diff to: previous 1.66: preferred, colored
Changes since revision 1.66: +0 -126 lines
Remove #if 0'ed code that was replaced by vm_ksubmap_init() and GC'ed on other platforms.
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Fri Nov 9 13:09:57 2001 UTC (10 years, 3 months ago) by dfr
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Diff to: previous 1.65: preferred, colored
Changes since revision 1.65: +1 -1 lines
Reserve more space for phys_avail. Really need to be more careful about overflowing phys_avail.
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Fri Nov 2 01:45:11 2001 UTC (10 years, 3 months ago) by peter
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Diff to: previous 1.64: preferred, colored
Changes since revision 1.64: +1 -1 lines
argh! cut/paste typo. :-( (committed on a different machine to what I was testing it on)
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Fri Nov 2 00:41:00 2001 UTC (10 years, 3 months ago) by peter
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Diff to: previous 1.63: preferred, colored
Changes since revision 1.63: +3 -1 lines
"Fix" a problem that got copied from alpha to ia64 and broke there. When we truncate the msgbuf size because the last chunk is too small, correctly terminate the phys_avail[] array - the VM system tests the *end* for zero, not the start. This leads the VM startup to attempt to recreate a duplicate set of pages for all physical memory. XXX the msgbuf handling is suspiciously different on i386 vs alpha/ia64...
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Mon Oct 29 12:04:23 2001 UTC (10 years, 3 months ago) by dfr
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Diff to: previous 1.62: preferred, colored
Changes since revision 1.62: +58 -1 lines
* Factor out common code for manipulating the RSE backing store. * Implement a fairly simplistic parser for unwinding stack frames. * Use unwind records for DDB's 'trace' command. Also add support for tracing past exceptions to the context which generated the exception. The stack unwind code requires a toolchain based on binutils-2.11.2 or later and gcc-3.0.1 or later.
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Tue Oct 23 22:23:22 2001 UTC (10 years, 3 months ago) by peter
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Diff to: previous 1.61: preferred, colored
Changes since revision 1.61: +1 -1 lines
Fix RAW dependency violation when compiled with gcc-3 Warning: Use of 'br.ret.sptk.many' violates RAW dependency 'PSR.tb' (data)
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Tue Oct 23 11:04:43 2001 UTC (10 years, 3 months ago) by peter
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Diff to: previous 1.60: preferred, colored
Changes since revision 1.60: +0 -5 lines
Turn off the single-user override. We've been running multi-user for some time. Having a machine boot unattended is useful. :-)
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Sun Oct 21 22:16:44 2001 UTC (10 years, 3 months ago) by des
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Diff to: previous 1.59: preferred, colored
Changes since revision 1.59: +0 -0 lines
[partially forced commit due to pilot error in earlier commit attempt]
{set,fill}_{,fp,db}regs() fixup:
- Add dummy {set,fill}_dbregs() on architectures that don't have them.
- KSEfy the powerpc versions (struct proc -> struct thread).
- Some architectures had the prototypes in md_var.h, some in reg.h, and
some in both; for consistency, move them to reg.h on all platforms.
These functions aren't really MD (the implementation is MD, but the interface
is MI), so they should move to an MI header, but I haven't figured out which
one yet.
Run-tested on i386, build-tested on Alpha, untested on other platforms.
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Sun Oct 21 22:14:00 2001 UTC (10 years, 3 months ago) by des
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Diff to: previous 1.58: preferred, colored
Changes since revision 1.58: +14 -1 lines
{set,fill}_{,fp,db}regs() fixup:
- Add dummy {set,fill}_dbregs() on architectures that don't have them.
- KSEfy the powerpc versions (struct proc -> struct thread).
- Some architectures had the prototypes in md_var.h, some in reg.h, and
some in both; for consistency, move them to reg.h on all platforms.
These functions aren't really MD (the implementation is MD, but the interface
is MI), so they should move to an MI header, but I haven't figured out which
{set,fill}_{,fp,db}regs() fixup:
- Add dummy {set,fill}_dbregs() on architectures that don't have them.
- KSEfy the powerpc versions (struct proc -> struct thread).
- Some architectures had the prototypes in md_var.h, some in reg.h, and
some in both; for consistency, move them to reg.h on all platforms.
These functions aren't really MD (the implementation is MD, but the interface
is MI), so they should move to an MI header, but I haven't figured out which
one yet.
Run-tested on i386, build-tested on Alpha, untested on other platforms.
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Sun Oct 21 14:01:48 2001 UTC (10 years, 3 months ago) by dfr
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Diff to: previous 1.57: preferred, colored
Changes since revision 1.57: +1 -1 lines
Use ia64_set_fpsr() instead of __asm to set ar.fpsr.
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Thu Oct 18 16:20:04 2001 UTC (10 years, 3 months ago) by dfr
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Diff to: previous 1.56: preferred, colored
Changes since revision 1.56: +26 -0 lines
Shift the code which packs and unpacks instruction bundles out of DDB since it is useful for various emulations duties (e.g. unaligned trap handling).
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Mon Oct 15 07:58:27 2001 UTC (10 years, 3 months ago) by marcel
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Diff to: previous 1.55: preferred, colored
Changes since revision 1.55: +2 -2 lines
When compiling with SKI support, create the fake memory regions when either the memory descriptor in the bootinfo is NULL or the descriptor count is 0.
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Thu Oct 11 12:31:50 2001 UTC (10 years, 4 months ago) by dfr
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Diff to: previous 1.54: preferred, colored
Changes since revision 1.54: +20 -12 lines
* Change the calling convention for execve so that it conforms to normal C calling conventions. This allows crt1.c to be written nearly without any inline assembler. * Initialise cpu_model[] so that the hw.model sysctl works properly.
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Sun Oct 7 14:20:01 2001 UTC (10 years, 4 months ago) by dfr
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Diff to: previous 1.53: preferred, colored
Changes since revision 1.53: +1 -2 lines
Remove bogus include.
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Sat Oct 6 16:06:48 2001 UTC (10 years, 4 months ago) by dfr
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Diff to: previous 1.52: preferred, colored
Changes since revision 1.52: +8 -8 lines
Move console probes until after we set boothowto so that 'boot -h' works.
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Sat Sep 29 11:43:36 2001 UTC (10 years, 4 months ago) by dfr
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Diff to: previous 1.51: preferred, colored
Changes since revision 1.51: +159 -38 lines
Various changes to use the firmware on a real machine.
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Sat Sep 22 19:50:12 2001 UTC (10 years, 4 months ago) by dfr
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Changes since revision 1.50: +16 -11 lines
* Turn off memory descriptor debugging - its served its purpose. * Don't get confused when memory regions don't lie on page boundaries - remember our page size is typically larger than the firmware's page size. * Add a function ia64_running_in_simulator() which is intended to detect whether the kernel is running in SKI or on real hardware.
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Tue Sep 18 13:26:30 2001 UTC (10 years, 4 months ago) by dfr
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Diff to: previous 1.49: preferred, colored
Changes since revision 1.49: +36 -2 lines
Flesh out identifycpu().
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Sat Sep 15 18:31:49 2001 UTC (10 years, 4 months ago) by dfr
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Diff to: previous 1.48: preferred, colored
Changes since revision 1.48: +54 -45 lines
Rearrange so we search for I/O port space as early as possible (i.e. before console probing). Also fix a confusion between EFI's page size which is fixed at 4096 and our own page size which is variable at compile time.
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Sat Sep 15 15:31:59 2001 UTC (10 years, 4 months ago) by dfr
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Changes since revision 1.47: +4 -6 lines
Use the MI console code to initialise the console.
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Sat Sep 15 12:29:46 2001 UTC (10 years, 4 months ago) by dfr
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Diff to: previous 1.46: preferred, colored
Changes since revision 1.46: +42 -24 lines
* Use Intel's EFI headers instead of home-grown ones. * Use the bootinfo's memory map if present instead of hard-coding SKI's memory map. * Record the location of the I/O Port Space if present in the memory map.
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Thu Sep 13 12:39:14 2001 UTC (10 years, 4 months ago) by dfr
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Changes since revision 1.45: +16 -71 lines
* Enable dynamically linked kernel. This involves adding a self-relocator to locore to process the @fptr relocations in the dynamic executable. * Don't initialise the timer until *after* we install the timecounter to avoid a race between timecounter initialisation and hardclock. * Tidy up bootinfo somewhat including adding sanity checks for when the kernel is loaded without a recognisable bootinfo.
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Wed Sep 12 08:37:40 2001 UTC (10 years, 5 months ago) by julian
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CVS tags: KSE_MILESTONE_2
Diff to: previous 1.44: preferred, colored
Changes since revision 1.44: +82 -64 lines
KSE Milestone 2 Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
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Mon Sep 10 13:39:59 2001 UTC (10 years, 5 months ago) by dfr
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CVS tags: KSE_PRE_MILESTONE_2
Diff to: previous 1.43: preferred, colored
Changes since revision 1.43: +10 -16 lines
* Make a start on a realistic definition for bootinfo. * Switch to proc0's stack and backing store before calling ia64_init so that we don't rely on the loader's stack at all. * Change kernel entry point name from locorestart to __start.
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Thu Sep 6 22:20:41 2001 UTC (10 years, 5 months ago) by jhb
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Diff to: previous 1.42: preferred, colored
Changes since revision 1.42: +2 -4 lines
Call sendsig() with the proc lock held and return with it held.
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Sun Sep 2 07:47:47 2001 UTC (10 years, 5 months ago) by peter
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Diff to: previous 1.41: preferred, colored
Changes since revision 1.41: +27 -15 lines
Merge from i386: various cleanups including moving the map calculations to MI code. This gets ia64 to compile again.
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Mon Aug 27 05:11:20 2001 UTC (10 years, 5 months ago) by peter
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Diff to: previous 1.40: preferred, colored
Changes since revision 1.40: +5 -2 lines
Enable hardwiring of things like tunables from embedded enironments that do not start from loader(8).
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Tue Aug 21 02:32:58 2001 UTC (10 years, 5 months ago) by peter
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Diff to: previous 1.39: preferred, colored
Changes since revision 1.39: +3 -1 lines
Make COMPAT_43 optional again. XXX we need COMPAT_FBSD3 etc for this stuff.
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Wed Aug 8 05:25:06 2001 UTC (10 years, 6 months ago) by peter
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Diff to: previous 1.38: preferred, colored
Changes since revision 1.38: +1 -54 lines
Zap 'ptrace(PT_READ_U, ...)' and 'ptrace(PT_WRITE_U, ...)' since they are a really nasty interface that should have been killed long ago when 'ptrace(PT_[SG]ETREGS' etc came along. The entity that they operate on (struct user) will not be around much longer since it is part-per-process and part-per-thread in a post-KSE world. gdb does not actually use this except for the obscure 'info udot' command which does a hexdump of as much of the child's 'struct user' as it can get. It carries its own #defines so it doesn't break compiles.
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Mon Aug 6 12:52:17 2001 UTC (10 years, 6 months ago) by dfr
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Diff to: previous 1.37: preferred, colored
Changes since revision 1.37: +1 -3 lines
Remove usage of nonexistent vm_mtx.
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Thu Jul 26 23:06:44 2001 UTC (10 years, 6 months ago) by peter
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Diff to: previous 1.36: preferred, colored
Changes since revision 1.36: +4 -1 lines
Call the early tunable setup functions as soon as kern_envp is available. Some things depend on hz being set not long after this.
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Fri Jun 29 11:10:35 2001 UTC (10 years, 7 months ago) by jhb
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Diff to: previous 1.35: preferred, colored
Changes since revision 1.35: +13 -13 lines
Add a new MI pointer to the process' trapframe p_frame instead of using various differently named pointers buried under p_md. Reviewed by: jake (in principle)
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Wed Jun 27 14:57:17 2001 UTC (10 years, 7 months ago) by jhb
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Diff to: previous 1.34: preferred, colored
Changes since revision 1.34: +5 -16 lines
Catch up to mbuf allocator changes from last September so this compiles again.
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Wed May 30 00:03:13 2001 UTC (10 years, 8 months ago) by jhb
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Diff to: previous 1.33: preferred, colored
Changes since revision 1.33: +3 -1 lines
- Catch up to the VM mutex changes. - Sort includes in a few places.
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Wed May 23 09:42:03 2001 UTC (10 years, 8 months ago) by ru
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Diff to: previous 1.32: preferred, colored
Changes since revision 1.32: +2 -2 lines
- FDESC, FIFO, NULL, PORTAL, PROC, UMAP and UNION file
systems were repo-copied from sys/miscfs to sys/fs.
- Renamed the following file systems and their modules:
fdesc -> fdescfs, portal -> portalfs, union -> unionfs.
- Renamed corresponding kernel options:
FDESC -> FDESCFS, PORTAL -> PORTALFS, UNION -> UNIONFS.
- Install header files for the above file systems.
- Removed bogus -I${.CURDIR}/../../sys CFLAGS from userland
Makefiles.
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Thu May 17 22:28:46 2001 UTC (10 years, 8 months ago) by jhb
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Diff to: previous 1.31: preferred, colored
Changes since revision 1.31: +1 -5 lines
- Move the setting of bootverbose to a MI SI_SUB_TUNABLES SYSINIT. - Attach a writable sysctl to bootverbose (debug.bootverbose) so it can be toggled after boot. - Move the printf of the version string to a SI_SUB_COPYRIGHT SYSINIT just afer the display of the copyright message instead of doing it by hand in three MD places.
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Thu May 10 17:45:47 2001 UTC (10 years, 9 months ago) by jhb
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Diff to: previous 1.30: preferred, colored
Changes since revision 1.30: +2 -3 lines
- Split out the support for per-CPU data from the SMP code. UP kernels have per-CPU data and gdb on the i386 at least needs access to it. - Clean up includes in kern_idle.c and subr_smp.c. Reviewed by: jake
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Fri Apr 27 19:28:22 2001 UTC (10 years, 9 months ago) by jhb
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Diff to: previous 1.29: preferred, colored
Changes since revision 1.29: +14 -9 lines
Overhaul of the SMP code. Several portions of the SMP kernel support have been made machine independent and various other adjustments have been made to support Alpha SMP. - It splits the per-process portions of hardclock() and statclock() off into hardclock_process() and statclock_process() respectively. hardclock() and statclock() call the *_process() functions for the current process so that UP systems will run as before. For SMP systems, it is simply necessary to ensure that all other processors execute the *_process() functions when the main clock functions are triggered on one CPU by an interrupt. For the alpha 4100, clock interrupts are delievered in a staggered broadcast fashion, so we simply call hardclock/statclock on the boot CPU and call the *_process() functions on the secondaries. For x86, we call statclock and hardclock as usual and then call forward_hardclock/statclock in the MD code to send an IPI to cause the AP's to execute forwared_hardclock/statclock which then call the *_process() functions. - forward_signal() and forward_roundrobin() have been reworked to be MI and to involve less hackery. Now the cpu doing the forward sets any flags, etc. and sends a very simple IPI_AST to the other cpu(s). AST IPIs now just basically return so that they can execute ast() and don't bother with setting the astpending or needresched flags themselves. This also removes the loop in forward_signal() as sched_lock closes the race condition that the loop worked around. - need_resched(), resched_wanted() and clear_resched() have been changed to take a process to act on rather than assuming curproc so that they can be used to implement forward_roundrobin() as described above. - Various other SMP variables have been moved to a MI subr_smp.c and a new header sys/smp.h declares MI SMP variables and API's. The IPI API's from machine/ipl.h have moved to machine/smp.h which is included by sys/smp.h. - The globaldata_register() and globaldata_find() functions as well as the SLIST of globaldata structures has become MI and moved into subr_smp.c. Also, the globaldata list is only available if SMP support is compiled in. Reviewed by: jake, peter Looked over by: eivind
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Tue Apr 24 15:55:47 2001 UTC (10 years, 9 months ago) by dfr
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Diff to: previous 1.28: preferred, colored
Changes since revision 1.28: +6 -1 lines
Align stack pointer and backing store pointer to 16 byte boundary when delivering signals.
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Thu Mar 29 20:26:12 2001 UTC (10 years, 10 months ago) by obrien
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Diff to: previous 1.27: preferred, colored
Changes since revision 1.27: +2 -2 lines
Reduce the emasculation of bounds_check_with_label() by one line, so we propagate a bio error condition to the caller and above.
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Wed Mar 28 09:03:21 2001 UTC (10 years, 10 months ago) by jhb
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Diff to: previous 1.26: preferred, colored
Changes since revision 1.26: +2 -2 lines
Rework the witness code to work with sx locks as well as mutexes.
- Introduce lock classes and lock objects. Each lock class specifies a
name and set of flags (or properties) shared by all locks of a given
type. Currently there are three lock classes: spin mutexes, sleep
mutexes, and sx locks. A lock object specifies properties of an
additional lock along with a lock name and all of the extra stuff needed
to make witness work with a given lock. This abstract lock stuff is
defined in sys/lock.h. The lockmgr constants, types, and prototypes have
been moved to sys/lockmgr.h. For temporary backwards compatability,
sys/lock.h includes sys/lockmgr.h.
- Replace proc->p_spinlocks with a per-CPU list, PCPU(spinlocks), of spin
locks held. By making this per-cpu, we do not have to jump through
magic hoops to deal with sched_lock changing ownership during context
switches.
- Replace proc->p_heldmtx, formerly a list of held sleep mutexes, with
proc->p_sleeplocks, which is a list of held sleep locks including sleep
mutexes and sx locks.
- Add helper macros for logging lock events via the KTR_LOCK KTR logging
level so that the log messages are consistent.
- Add some new flags that can be passed to mtx_init():
- MTX_NOWITNESS - specifies that this lock should be ignored by witness.
This is used for the mutex that blocks a sx lock for example.
- MTX_QUIET - this is not new, but you can pass this to mtx_init() now
and no events will be logged for this lock, so that one doesn't have
to change all the individual mtx_lock/unlock() operations.
- All lock objects maintain an initialized flag. Use this flag to export
a mtx_initialized() macro that can be safely called from drivers. Also,
we on longer walk the all_mtx list if MUTEX_DEBUG is defined as witness
performs the corresponding checks using the initialized flag.
- The lock order reversal messages have been improved to output slightly
more accurate file and line numbers.
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Fri Mar 9 13:44:53 2001 UTC (10 years, 11 months ago) by dfr
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Diff to: previous 1.25: preferred, colored
Changes since revision 1.25: +2 -3 lines
Adjust a comment slightly.
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Wed Mar 7 03:37:02 2001 UTC (10 years, 11 months ago) by jhb
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Diff to: previous 1.24: preferred, colored
Changes since revision 1.24: +2 -2 lines
Grab the process lock while calling psignal and before calling psignal.
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Fri Feb 9 16:25:15 2001 UTC (11 years ago) by jhb
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Diff to: previous 1.23: preferred, colored
Changes since revision 1.23: +2 -1 lines
Move the initailization of the proc lock for proc0 very early into the MD startup code.
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Fri Feb 9 14:50:52 2001 UTC (11 years ago) by jhb
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Diff to: previous 1.22: preferred, colored
Changes since revision 1.22: +1 -8 lines
Remove bogus #if 0'd code that dinked with the saved interrupt state in sched_lock.
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Fri Feb 9 06:09:34 2001 UTC (11 years ago) by bmilekic
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Diff to: previous 1.21: preferred, colored
Changes since revision 1.21: +2 -2 lines
Change and clean the mutex lock interface.
mtx_enter(lock, type) becomes:
mtx_lock(lock) for sleep locks (MTX_DEF-initialized locks)
mtx_lock_spin(lock) for spin locks (MTX_SPIN-initialized)
similarily, for releasing a lock, we now have:
mtx_unlock(lock) for MTX_DEF and mtx_unlock_spin(lock) for MTX_SPIN.
We change the caller interface for the two different types of locks
because the semantics are entirely different for each case, and this
makes it explicitly clear and, at the same time, it rids us of the
extra `type' argument.
The enter->lock and exit->unlock change has been made with the idea
that we're "locking data" and not "entering locked code" in mind.
Further, remove all additional "flags" previously passed to the
lock acquire/release routines with the exception of two:
MTX_QUIET and MTX_NOSWITCH
The functionality of these flags is preserved and they can be passed
to the lock/unlock routines by calling the corresponding wrappers:
mtx_{lock, unlock}_flags(lock, flag(s)) and
mtx_{lock, unlock}_spin_flags(lock, flag(s)) for MTX_DEF and MTX_SPIN
locks, respectively.
Re-inline some lock acq/rel code; in the sleep lock case, we only
inline the _obtain_lock()s in order to ensure that the inlined code
fits into a cache line. In the spin lock case, we inline recursion and
actually only perform a function call if we need to spin. This change
has been made with the idea that we generally tend to avoid spin locks
and that also the spin locks that we do have and are heavily used
(i.e. sched_lock) do recurse, and therefore in an effort to reduce
function call overhead for some architectures (such as alpha), we
inline recursion for this case.
Create a new malloc type for the witness code and retire from using
the M_DEV type. The new type is called M_WITNESS and is only declared
if WITNESS is enabled.
Begin cleaning up some machdep/mutex.h code - specifically updated the
"optimized" inlined code in alpha/mutex.h and wrote MTX_LOCK_SPIN
and MTX_UNLOCK_SPIN asm macros for the i386/mutex.h as we presently
need those.
Finally, caught up to the interface changes in all sys code.
Contributors: jake, jhb, jasone (in no particular order)
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Sun Feb 4 07:00:46 2001 UTC (11 years ago) by peter
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Diff to: previous 1.20: preferred, colored
Changes since revision 1.20: +2 -1 lines
All the world is not an i386. Merge rev 1.438 of i386/i386/machdep.c. Make buffer_map a system map.
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Mon Jan 29 13:31:18 2001 UTC (11 years ago) by dfr
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Diff to: previous 1.19: preferred, colored
Changes since revision 1.19: +23 -23 lines
Flesh out EFI support somewhat.
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Fri Jan 26 17:52:34 2001 UTC (11 years ago) by dfr
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Diff to: previous 1.18: preferred, colored
Changes since revision 1.18: +8 -3 lines
Initialise proc0.p_heldmtx and proc0.p_contested and call mtx_enter(&Giant, MTX_DEF) after Giant is initialised. Reviewed by: jhb
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Wed Jan 24 10:36:47 2001 UTC (11 years ago) by jhb
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Diff to: previous 1.17: preferred, colored
Changes since revision 1.17: +11 -2 lines
- Proc locking. - P_FOO -> PS_FOO.
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Sun Jan 21 07:52:17 2001 UTC (11 years ago) by jasone
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Diff to: previous 1.16: preferred, colored
Changes since revision 1.16: +5 -5 lines
Remove MUTEX_DECLARE() and MTX_COLD. Instead, postpone full mutex initialization until after malloc() is safe to call, then iterate through all mutexes and complete their initialization. This change is necessary in order to avoid some circular bootstrapping dependencies.
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Fri Jan 19 01:58:49 2001 UTC (11 years ago) by bmilekic
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Diff to: previous 1.15: preferred, colored
Changes since revision 1.15: +4 -4 lines
Implement MTX_RECURSE flag for mtx_init(). All calls to mtx_init() for mutexes that recurse must now include the MTX_RECURSE bit in the flag argument variable. This change is in preparation for an upcoming (further) mutex API cleanup. The witness code will call panic() if a lock is found to recurse but the MTX_RECURSE bit was not set during the lock's initialization. The old MTX_RECURSE "state" bit (in mtx_lock) has been renamed to MTX_RECURSED, which is more appropriate given its meaning. The following locks have been made "recursive," thus far: eventhandler, Giant, callout, sched_lock, possibly some others declared in the architecture-specific code, all of the network card driver locks in pci/, as well as some other locks in dev/ stuff that I've found to be recursive. Reviewed by: jhb
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Tue Dec 5 00:35:58 2000 UTC (11 years, 2 months ago) by jake
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Diff to: previous 1.14: preferred, colored
Changes since revision 1.14: +1 -28 lines
Remove the last of the MD netisr code. It is now all MI. Remove spending, which was unused now that all software interrupts have their own thread. Make the legacy schednetisr use an atomic op for setting bits in the netisr mask. Reviewed by: jhb
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Thu Nov 30 05:23:47 2000 UTC (11 years, 2 months ago) by marcel
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Diff to: previous 1.13: preferred, colored
Changes since revision 1.13: +9 -3 lines
Don't use p->p_sigstk.ss_flags to keep state of whether the process is on the alternate stack or not. For compatibility with sigstack(2) state is being updated if such is needed. We now determine whether the process is on the alternate stack by looking at its stack pointer. This allows a process to siglongjmp from a signal handler on the alternate stack to the place of the sigsetjmp on the normal stack. When maintaining state, this would have invalidated the state information and causing a subsequent signal to be delivered on the normal stack instead of the alternate stack. PR: 22286
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Sun Nov 26 13:52:17 2000 UTC (11 years, 2 months ago) by jlemon
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Diff to: previous 1.12: preferred, colored
Changes since revision 1.12: +2 -2 lines
Add 'mpsafe' parameter to callout_init() in MD bits. Reminded by: jake
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Sun Nov 19 06:02:23 2000 UTC (11 years, 2 months ago) by jake
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Diff to: previous 1.11: preferred, colored
Changes since revision 1.11: +3 -1 lines
- Protect the callout wheel with a separate spin mutex, callout_lock. - Use the mutex in hardclock to ensure no races between it and softclock. - Make softclock be INTR_MPSAFE and provide a flag, CALLOUT_MPSAFE, which specifies that a callout handler does not need giant. There is still no way to set this flag when regstering a callout. Reviewed by: -smp@, jlemon
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Fri Oct 27 11:45:29 2000 UTC (11 years, 3 months ago) by phk
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Diff to: previous 1.10: preferred, colored
Changes since revision 1.10: +1 -3 lines
Convert all users of fldoff() to offsetof(). fldoff() is bad because it only takes a struct tag which makes it impossible to use unions, typedefs etc. Define __offsetof() in <machine/ansi.h> Define offsetof() in terms of __offsetof() in <stddef.h> and <sys/types.h> Remove myriad of local offsetof() definitions. Remove includes of <stddef.h> in kernel code. NB: Kernelcode should *never* include from /usr/include ! Make <sys/queue.h> include <machine/ansi.h> to avoid polluting the API. Deprecate <struct.h> with a warning. The warning turns into an error on 01-12-2000 and the file gets removed entirely on 01-01-2001. Paritials reviews by: various. Significant brucifications by: bde
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Tue Oct 24 19:54:37 2000 UTC (11 years, 3 months ago) by dfr
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Diff to: previous 1.9: preferred, colored
Changes since revision 1.9: +68 -29 lines
* Various fixes to breakage introduced by the atomic and mutex reorgs. * Fixes to the signal delivery code. Not quite right yet. I would have preferred to wait until I have signal delivery actually working but the current kernel in CVS doesn't build.
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Fri Oct 20 07:32:48 2000 UTC (11 years, 3 months ago) by jhb
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Diff to: previous 1.8: preferred, colored
Changes since revision 1.8: +5 -5 lines
- machine/mutex.h -> sys/mutex.h - Use MUTEX_DECLARE() and MTX_COLD for Giant and sched_lock.
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Thu Oct 19 20:39:48 2000 UTC (11 years, 3 months ago) by dfr
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Diff to: previous 1.7: preferred, colored
Changes since revision 1.7: +2 -3 lines
Don't force bootverbose anymore.
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Mon Oct 16 08:54:38 2000 UTC (11 years, 3 months ago) by dfr
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Diff to: previous 1.6: preferred, colored
Changes since revision 1.6: +6 -4 lines
* Correct some of my misunderstandings about how best to switch to the kernel backing store. * Implement syscalls via break instructions. * Fix backing store copying in cpu_fork() so that the child gets the right register values. This thing is actually starting to work now. This set of changes takes me up to the second execve (the one which runs the first shell). Next stop single-user mode :-).
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Thu Oct 12 17:47:01 2000 UTC (11 years, 4 months ago) by dfr
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Diff to: previous 1.5: preferred, colored
Changes since revision 1.5: +2 -2 lines
Implement a rudimentary interrupt handling system which should be good enough for clock interrupts in SKI.
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Thu Oct 12 14:36:38 2000 UTC (11 years, 4 months ago) by dfr
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Diff to: previous 1.4: preferred, colored
Changes since revision 1.4: +35 -83 lines
* Fix exception handling so that it actually works. We can now handle exceptions from both kernel and user mode. * Fix context switching so that we can switch back to a proc which we switched away from (we were saving the state in the wrong place). * Implement lazy switching of the high-fp state. This needs to be looked at again for SMP to cope with the case of a process migrating from one processor to another while it has the high-fp state. * Make setregs() work properly. I still think this should be called cpu_exec() or something. * Various other minor fixes. With this lot, we can execve() /sbin/init and we get all the way up to its first syscall. At that point, we stop because syscall handling is not done yet.
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Tue Oct 10 14:57:10 2000 UTC (11 years, 4 months ago) by dfr
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Diff to: previous 1.3: preferred, colored
Changes since revision 1.3: +2 -2 lines
* Add rudimentary DDB support (no kgdb, no backtrace, no single step). * Track recent changes to SWI code. * Allocate RIDs for pmaps (untested). * Implement assembler version of cpu_switch - its cleaner that way.
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Wed Oct 4 17:52:58 2000 UTC (11 years, 4 months ago) by dfr
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Diff to: previous 1.2: preferred, colored
Changes since revision 1.2: +22 -2 lines
Next round of fixes to the ia64 code. This includes simulated clock and disk drivers along with a load of fixes to context switching, fork handling and a load of other stuff I can't remember now. This takes us as far as start_init() before it dies. I guess now I will have to finish off the VM system and syscall handling :-).
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Sat Sep 30 17:48:43 2000 UTC (11 years, 4 months ago) by dfr
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Diff to: previous 1.1: preferred, colored
Changes since revision 1.1: +16 -15 lines
Next round of ia64 work, including fixes to context switching,
implementing cpu_fork(), copy*str(), bcopy(), copy{in,out}(). With these
changes, my test kernel reaches the mountroot prompt.
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Fri Sep 29 13:46:04 2000 UTC (11 years, 4 months ago) by dfr
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This is the first snapshot of the FreeBSD/ia64 kernel. This kernel will not work on any real hardware (or fully work on any simulator). Much more needs to happen before this is actually functional but its nice to see the FreeBSD copyright message appear in the ia64 simulator.